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Finding the Fourth Proportional to 888.10, 1,330.55 and 724.90

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Solution

The fourth proportional to 888.10, 1,330.55 and 724.90 is: 1,086.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    888.10 : 1,330.55 = 724.90 : x
  2. Step 2: Convert to fraction form
    888.10/1,330.55 = 724.90/x
  3. Step 3: Cross multiply
    888.10x = 1,330.55 × 724.90
  4. Step 4: Simplify right side
    888.10x = 964,515.70
  5. Step 5: Solve for x
    x = 964,515.70/888.10
  6. Step 6: Final answer
    x = 1,086.04

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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.