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Finding the Fourth Proportional to 610.47, 915.78 and 285.93

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Solution

The fourth proportional to 610.47, 915.78 and 285.93 is: 428.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    610.47 : 915.78 = 285.93 : x
  2. Step 2: Convert to fraction form
    610.47/915.78 = 285.93/x
  3. Step 3: Cross multiply
    610.47x = 915.78 × 285.93
  4. Step 4: Simplify right side
    610.47x = 261,848.98
  5. Step 5: Solve for x
    x = 261,848.98/610.47
  6. Step 6: Final answer
    x = 428.93

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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.