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Finding the Fourth Proportional to 625.42, 938.10 and 509.32

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Solution

The fourth proportional to 625.42, 938.10 and 509.32 is: 763.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    625.42 : 938.10 = 509.32 : x
  2. Step 2: Convert to fraction form
    625.42/938.10 = 509.32/x
  3. Step 3: Cross multiply
    625.42x = 938.10 × 509.32
  4. Step 4: Simplify right side
    625.42x = 477,790.55
  5. Step 5: Solve for x
    x = 477,790.55/625.42
  6. Step 6: Final answer
    x = 763.95

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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.