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Finding the Fourth Proportional to 610.43, 915.03 and 427.77

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Solution

The fourth proportional to 610.43, 915.03 and 427.77 is: 641.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    610.43 : 915.03 = 427.77 : x
  2. Step 2: Convert to fraction form
    610.43/915.03 = 427.77/x
  3. Step 3: Cross multiply
    610.43x = 915.03 × 427.77
  4. Step 4: Simplify right side
    610.43x = 391,422.38
  5. Step 5: Solve for x
    x = 391,422.38/610.43
  6. Step 6: Final answer
    x = 641.22

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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.