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Finding the Fourth Proportional to 888.28, 1,331.58 and 310.78

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Solution

The fourth proportional to 888.28, 1,331.58 and 310.78 is: 465.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    888.28 : 1,331.58 = 310.78 : x
  2. Step 2: Convert to fraction form
    888.28/1,331.58 = 310.78/x
  3. Step 3: Cross multiply
    888.28x = 1,331.58 × 310.78
  4. Step 4: Simplify right side
    888.28x = 413,828.43
  5. Step 5: Solve for x
    x = 413,828.43/888.28
  6. Step 6: Final answer
    x = 465.88

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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.