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Finding the Fourth Proportional to 625,387,571.28, 938,225,474.28 and 216,443,726.64

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Solution

The fourth proportional to 625,387,571.28, 938,225,474.28 and 216,443,726.64 is: 324,715,468.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    625,387,571.28 : 938,225,474.28 = 216,443,726.64 : x
  2. Step 2: Convert to fraction form
    625,387,571.28/938,225,474.28 = 216,443,726.64/x
  3. Step 3: Cross multiply
    625,387,571.28x = 938,225,474.28 × 216,443,726.64
  4. Step 4: Simplify right side
    625,387,571.28x = 203,073,018,081,744,640
  5. Step 5: Solve for x
    x = 203,073,018,081,744,640/625,387,571.28
  6. Step 6: Final answer
    x = 324,715,468.31

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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.