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Finding the Fourth Proportional to 663,396, 915,487.12 and 361,591.20

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Solution

The fourth proportional to 663,396, 915,487.12 and 361,591.20 is: 498,996.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    663,396 : 915,487.12 = 361,591.20 : x
  2. Step 2: Convert to fraction form
    663,396/915,487.12 = 361,591.20/x
  3. Step 3: Cross multiply
    663,396x = 915,487.12 × 361,591.20
  4. Step 4: Simplify right side
    663,396x = 331,032,086,305.34
  5. Step 5: Solve for x
    x = 331,032,086,305.34/663,396
  6. Step 6: Final answer
    x = 498,996.20

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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.