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Finding the Fourth Proportional to 621.35, 932.03 and 439.10

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Solution

The fourth proportional to 621.35, 932.03 and 439.10 is: 658.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    621.35 : 932.03 = 439.10 : x
  2. Step 2: Convert to fraction form
    621.35/932.03 = 439.10/x
  3. Step 3: Cross multiply
    621.35x = 932.03 × 439.10
  4. Step 4: Simplify right side
    621.35x = 409,252.18
  5. Step 5: Solve for x
    x = 409,252.18/621.35
  6. Step 6: Final answer
    x = 658.65

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Double scale
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1.5x scale

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.