Home / 1,211,458,435.80-1,817,187,653.70-393,653,405.40

Finding the Fourth Proportional to 1,211,458,435.80, 1,817,187,653.70 and 393,653,405.40

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Solution

The fourth proportional to 1,211,458,435.80, 1,817,187,653.70 and 393,653,405.40 is: 590,480,108.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,211,458,435.80 : 1,817,187,653.70 = 393,653,405.40 : x
  2. Step 2: Convert to fraction form
    1,211,458,435.80/1,817,187,653.70 = 393,653,405.40/x
  3. Step 3: Cross multiply
    1,211,458,435.80x = 1,817,187,653.70 × 393,653,405.40
  4. Step 4: Simplify right side
    1,211,458,435.80x = 715,342,108,129,840,896
  5. Step 5: Solve for x
    x = 715,342,108,129,840,896/1,211,458,435.80
  6. Step 6: Final answer
    x = 590,480,108.10

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Double scale
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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.