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Finding the Fourth Proportional to 625.47, 938.20 and 260.25

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Solution

The fourth proportional to 625.47, 938.20 and 260.25 is: 390.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    625.47 : 938.20 = 260.25 : x
  2. Step 2: Convert to fraction form
    625.47/938.20 = 260.25/x
  3. Step 3: Cross multiply
    625.47x = 938.20 × 260.25
  4. Step 4: Simplify right side
    625.47x = 244,166.88
  5. Step 5: Solve for x
    x = 244,166.88/625.47
  6. Step 6: Final answer
    x = 390.38

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Similar ratio
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1.5x scale

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.