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Finding the Fourth Proportional to 915.52, 1,372.96 and 367.60

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Solution

The fourth proportional to 915.52, 1,372.96 and 367.60 is: 551.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    915.52 : 1,372.96 = 367.60 : x
  2. Step 2: Convert to fraction form
    915.52/1,372.96 = 367.60/x
  3. Step 3: Cross multiply
    915.52x = 1,372.96 × 367.60
  4. Step 4: Simplify right side
    915.52x = 504,700.10
  5. Step 5: Solve for x
    x = 504,700.10/915.52
  6. Step 6: Final answer
    x = 551.27

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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.