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Finding the Fourth Proportional to 703,584,631.52, 970,947,935.52 and 390,318,853.04

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Solution

The fourth proportional to 703,584,631.52, 970,947,935.52 and 390,318,853.04 is: 538,640,651.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    703,584,631.52 : 970,947,935.52 = 390,318,853.04 : x
  2. Step 2: Convert to fraction form
    703,584,631.52/970,947,935.52 = 390,318,853.04/x
  3. Step 3: Cross multiply
    703,584,631.52x = 970,947,935.52 × 390,318,853.04
  4. Step 4: Simplify right side
    703,584,631.52x = 378,979,284,553,722,304
  5. Step 5: Solve for x
    x = 378,979,284,553,722,304/703,584,631.52
  6. Step 6: Final answer
    x = 538,640,651.85

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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.