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Finding the Fourth Proportional to 610.92, 915.92 and 199.80

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Solution

The fourth proportional to 610.92, 915.92 and 199.80 is: 299.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    610.92 : 915.92 = 199.80 : x
  2. Step 2: Convert to fraction form
    610.92/915.92 = 199.80/x
  3. Step 3: Cross multiply
    610.92x = 915.92 × 199.80
  4. Step 4: Simplify right side
    610.92x = 183,000.82
  5. Step 5: Solve for x
    x = 183,000.82/610.92
  6. Step 6: Final answer
    x = 299.55

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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.