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Finding the Fourth Proportional to 610.24, 915.15 and 378.78

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Solution

The fourth proportional to 610.24, 915.15 and 378.78 is: 568.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    610.24 : 915.15 = 378.78 : x
  2. Step 2: Convert to fraction form
    610.24/915.15 = 378.78/x
  3. Step 3: Cross multiply
    610.24x = 915.15 × 378.78
  4. Step 4: Simplify right side
    610.24x = 346,640.52
  5. Step 5: Solve for x
    x = 346,640.52/610.24
  6. Step 6: Final answer
    x = 568.04

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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.