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Finding the Fourth Proportional to 625.80, 938.66 and 260.48

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Solution

The fourth proportional to 625.80, 938.66 and 260.48 is: 390.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    625.80 : 938.66 = 260.48 : x
  2. Step 2: Convert to fraction form
    625.80/938.66 = 260.48/x
  3. Step 3: Cross multiply
    625.80x = 938.66 × 260.48
  4. Step 4: Simplify right side
    625.80x = 244,502.16
  5. Step 5: Solve for x
    x = 244,502.16/625.80
  6. Step 6: Final answer
    x = 390.70

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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.