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Finding the Fourth Proportional to 663,310.92, 915,369 and 361,504.92

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Solution

The fourth proportional to 663,310.92, 915,369 and 361,504.92 is: 498,876.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    663,310.92 : 915,369 = 361,504.92 : x
  2. Step 2: Convert to fraction form
    663,310.92/915,369 = 361,504.92/x
  3. Step 3: Cross multiply
    663,310.92x = 915,369 × 361,504.92
  4. Step 4: Simplify right side
    663,310.92x = 330,910,397,115.48
  5. Step 5: Solve for x
    x = 330,910,397,115.48/663,310.92
  6. Step 6: Final answer
    x = 498,876.75

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Double scale
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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.