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Finding the Fourth Proportional to 610.57, 915.17 and 263.78

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Solution

The fourth proportional to 610.57, 915.17 and 263.78 is: 395.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    610.57 : 915.17 = 263.78 : x
  2. Step 2: Convert to fraction form
    610.57/915.17 = 263.78/x
  3. Step 3: Cross multiply
    610.57x = 915.17 × 263.78
  4. Step 4: Simplify right side
    610.57x = 241,398.97
  5. Step 5: Solve for x
    x = 241,398.97/610.57
  6. Step 6: Final answer
    x = 395.37

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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.