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Finding the Fourth Proportional to 625.12, 938.49 and 394.47

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Solution

The fourth proportional to 625.12, 938.49 and 394.47 is: 592.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    625.12 : 938.49 = 394.47 : x
  2. Step 2: Convert to fraction form
    625.12/938.49 = 394.47/x
  3. Step 3: Cross multiply
    625.12x = 938.49 × 394.47
  4. Step 4: Simplify right side
    625.12x = 370,204.67
  5. Step 5: Solve for x
    x = 370,204.67/625.12
  6. Step 6: Final answer
    x = 592.22

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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.