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Finding the Fourth Proportional to 610.88, 915.71 and 285.66

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Solution

The fourth proportional to 610.88, 915.71 and 285.66 is: 428.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    610.88 : 915.71 = 285.66 : x
  2. Step 2: Convert to fraction form
    610.88/915.71 = 285.66/x
  3. Step 3: Cross multiply
    610.88x = 915.71 × 285.66
  4. Step 4: Simplify right side
    610.88x = 261,580.29
  5. Step 5: Solve for x
    x = 261,580.29/610.88
  6. Step 6: Final answer
    x = 428.21

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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.