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Finding the Fourth Proportional to 610.48, 915.99 and 285.62

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Solution

The fourth proportional to 610.48, 915.99 and 285.62 is: 428.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    610.48 : 915.99 = 285.62 : x
  2. Step 2: Convert to fraction form
    610.48/915.99 = 285.62/x
  3. Step 3: Cross multiply
    610.48x = 915.99 × 285.62
  4. Step 4: Simplify right side
    610.48x = 261,623.64
  5. Step 5: Solve for x
    x = 261,623.64/610.48
  6. Step 6: Final answer
    x = 428.56

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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.