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Finding the Fourth Proportional to 625.65, 938.97 and 260.25

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Solution

The fourth proportional to 625.65, 938.97 and 260.25 is: 390.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    625.65 : 938.97 = 260.25 : x
  2. Step 2: Convert to fraction form
    625.65/938.97 = 260.25/x
  3. Step 3: Cross multiply
    625.65x = 938.97 × 260.25
  4. Step 4: Simplify right side
    625.65x = 244,366.94
  5. Step 5: Solve for x
    x = 244,366.94/625.65
  6. Step 6: Final answer
    x = 390.58

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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.