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Finding the Fourth Proportional to 915.03, 1,372.50 and 731.57

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Solution

The fourth proportional to 915.03, 1,372.50 and 731.57 is: 1,097.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    915.03 : 1,372.50 = 731.57 : x
  2. Step 2: Convert to fraction form
    915.03/1,372.50 = 731.57/x
  3. Step 3: Cross multiply
    915.03x = 1,372.50 × 731.57
  4. Step 4: Simplify right side
    915.03x = 1,004,072.96
  5. Step 5: Solve for x
    x = 1,004,072.96/915.03
  6. Step 6: Final answer
    x = 1,097.31

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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.