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Finding the Fourth Proportional to 888.62, 1,332.78 and 239.20

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Solution

The fourth proportional to 888.62, 1,332.78 and 239.20 is: 358.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    888.62 : 1,332.78 = 239.20 : x
  2. Step 2: Convert to fraction form
    888.62/1,332.78 = 239.20/x
  3. Step 3: Cross multiply
    888.62x = 1,332.78 × 239.20
  4. Step 4: Simplify right side
    888.62x = 318,804.92
  5. Step 5: Solve for x
    x = 318,804.92/888.62
  6. Step 6: Final answer
    x = 358.76

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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.