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Finding the Fourth Proportional to 986,507.88, 1,361,385.54 and 556,806.12

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Solution

The fourth proportional to 986,507.88, 1,361,385.54 and 556,806.12 is: 768,395.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    986,507.88 : 1,361,385.54 = 556,806.12 : x
  2. Step 2: Convert to fraction form
    986,507.88/1,361,385.54 = 556,806.12/x
  3. Step 3: Cross multiply
    986,507.88x = 1,361,385.54 × 556,806.12
  4. Step 4: Simplify right side
    986,507.88x = 758,027,800,351.51
  5. Step 5: Solve for x
    x = 758,027,800,351.51/986,507.88
  6. Step 6: Final answer
    x = 768,395.08

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Double scale
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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.