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Finding the Fourth Proportional to 915.38, 1,373.20 and 482.42

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Solution

The fourth proportional to 915.38, 1,373.20 and 482.42 is: 723.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    915.38 : 1,373.20 = 482.42 : x
  2. Step 2: Convert to fraction form
    915.38/1,373.20 = 482.42/x
  3. Step 3: Cross multiply
    915.38x = 1,373.20 × 482.42
  4. Step 4: Simplify right side
    915.38x = 662,459.14
  5. Step 5: Solve for x
    x = 662,459.14/915.38
  6. Step 6: Final answer
    x = 723.70

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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.