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Finding the Fourth Proportional to 691,879,999.92, 954,794,304.12 and 378,614,131.24

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Solution

The fourth proportional to 691,879,999.92, 954,794,304.12 and 378,614,131.24 is: 522,487,448.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    691,879,999.92 : 954,794,304.12 = 378,614,131.24 : x
  2. Step 2: Convert to fraction form
    691,879,999.92/954,794,304.12 = 378,614,131.24/x
  3. Step 3: Cross multiply
    691,879,999.92x = 954,794,304.12 × 378,614,131.24
  4. Step 4: Simplify right side
    691,879,999.92x = 361,498,615,967,294,144
  5. Step 5: Solve for x
    x = 361,498,615,967,294,144/691,879,999.92
  6. Step 6: Final answer
    x = 522,487,448.70

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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.