Home / 1,215,338,138.19-1,677,168,332.52-658,421,185.26

Finding the Fourth Proportional to 1,215,338,138.19, 1,677,168,332.52 and 658,421,185.26

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Solution

The fourth proportional to 1,215,338,138.19, 1,677,168,332.52 and 658,421,185.26 is: 908,622,157.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,215,338,138.19 : 1,677,168,332.52 = 658,421,185.26 : x
  2. Step 2: Convert to fraction form
    1,215,338,138.19/1,677,168,332.52 = 658,421,185.26/x
  3. Step 3: Cross multiply
    1,215,338,138.19x = 1,677,168,332.52 × 658,421,185.26
  4. Step 4: Simplify right side
    1,215,338,138.19x = 1,104,283,161,378,356,224
  5. Step 5: Solve for x
    x = 1,104,283,161,378,356,224/1,215,338,138.19
  6. Step 6: Final answer
    x = 908,622,157.64

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Half scale
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Double scale
Find fourth proportional to 1,215,338,139.19, 1,677,168,333.90 and 658,421,186.26
Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.