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Finding the Fourth Proportional to 610.09, 915.33 and 285.68

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Solution

The fourth proportional to 610.09, 915.33 and 285.68 is: 428.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    610.09 : 915.33 = 285.68 : x
  2. Step 2: Convert to fraction form
    610.09/915.33 = 285.68/x
  3. Step 3: Cross multiply
    610.09x = 915.33 × 285.68
  4. Step 4: Simplify right side
    610.09x = 261,491.47
  5. Step 5: Solve for x
    x = 261,491.47/610.09
  6. Step 6: Final answer
    x = 428.61

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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.