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Finding the Fourth Proportional to 610.16, 915.24 and 285.76

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Solution

The fourth proportional to 610.16, 915.24 and 285.76 is: 428.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    610.16 : 915.24 = 285.76 : x
  2. Step 2: Convert to fraction form
    610.16/915.24 = 285.76/x
  3. Step 3: Cross multiply
    610.16x = 915.24 × 285.76
  4. Step 4: Simplify right side
    610.16x = 261,538.98
  5. Step 5: Solve for x
    x = 261,538.98/610.16
  6. Step 6: Final answer
    x = 428.64

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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.