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Finding the Fourth Proportional to 625.57, 938.39 and 260.39

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Solution

The fourth proportional to 625.57, 938.39 and 260.39 is: 390.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    625.57 : 938.39 = 260.39 : x
  2. Step 2: Convert to fraction form
    625.57/938.39 = 260.39/x
  3. Step 3: Cross multiply
    625.57x = 938.39 × 260.39
  4. Step 4: Simplify right side
    625.57x = 244,348.42
  5. Step 5: Solve for x
    x = 244,348.42/625.57
  6. Step 6: Final answer
    x = 390.60

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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.