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Finding the Fourth Proportional to 625.67, 938.80 and 417.57

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Solution

The fourth proportional to 625.67, 938.80 and 417.57 is: 626.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    625.67 : 938.80 = 417.57 : x
  2. Step 2: Convert to fraction form
    625.67/938.80 = 417.57/x
  3. Step 3: Cross multiply
    625.67x = 938.80 × 417.57
  4. Step 4: Simplify right side
    625.67x = 392,011.07
  5. Step 5: Solve for x
    x = 392,011.07/625.67
  6. Step 6: Final answer
    x = 626.55

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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.