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Finding the Fourth Proportional to 663,738.71, 915,957.72 and 361,932.71

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Solution

The fourth proportional to 663,738.71, 915,957.72 and 361,932.71 is: 499,466.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    663,738.71 : 915,957.72 = 361,932.71 : x
  2. Step 2: Convert to fraction form
    663,738.71/915,957.72 = 361,932.71/x
  3. Step 3: Cross multiply
    663,738.71x = 915,957.72 × 361,932.71
  4. Step 4: Simplify right side
    663,738.71x = 331,515,059,845.02
  5. Step 5: Solve for x
    x = 331,515,059,845.02/663,738.71
  6. Step 6: Final answer
    x = 499,466.21

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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.