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Finding the Fourth Proportional to 888.54, 1,332.45 and 426.30

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Solution

The fourth proportional to 888.54, 1,332.45 and 426.30 is: 639.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    888.54 : 1,332.45 = 426.30 : x
  2. Step 2: Convert to fraction form
    888.54/1,332.45 = 426.30/x
  3. Step 3: Cross multiply
    888.54x = 1,332.45 × 426.30
  4. Step 4: Simplify right side
    888.54x = 568,023.44
  5. Step 5: Solve for x
    x = 568,023.44/888.54
  6. Step 6: Final answer
    x = 639.28

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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.