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Finding the Fourth Proportional to 915.92, 1,373.96 and 299.68

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Solution

The fourth proportional to 915.92, 1,373.96 and 299.68 is: 449.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    915.92 : 1,373.96 = 299.68 : x
  2. Step 2: Convert to fraction form
    915.92/1,373.96 = 299.68/x
  3. Step 3: Cross multiply
    915.92x = 1,373.96 × 299.68
  4. Step 4: Simplify right side
    915.92x = 411,748.33
  5. Step 5: Solve for x
    x = 411,748.33/915.92
  6. Step 6: Final answer
    x = 449.55

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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.