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Finding the Fourth Proportional to 610.57, 915.86 and 199.71

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Solution

The fourth proportional to 610.57, 915.86 and 199.71 is: 299.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    610.57 : 915.86 = 199.71 : x
  2. Step 2: Convert to fraction form
    610.57/915.86 = 199.71/x
  3. Step 3: Cross multiply
    610.57x = 915.86 × 199.71
  4. Step 4: Simplify right side
    610.57x = 182,906.40
  5. Step 5: Solve for x
    x = 182,906.40/610.57
  6. Step 6: Final answer
    x = 299.57

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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.