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Finding the Fourth Proportional to 888.75, 1,331.82 and 498.30

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Solution

The fourth proportional to 888.75, 1,331.82 and 498.30 is: 746.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    888.75 : 1,331.82 = 498.30 : x
  2. Step 2: Convert to fraction form
    888.75/1,331.82 = 498.30/x
  3. Step 3: Cross multiply
    888.75x = 1,331.82 × 498.30
  4. Step 4: Simplify right side
    888.75x = 663,645.91
  5. Step 5: Solve for x
    x = 663,645.91/888.75
  6. Step 6: Final answer
    x = 746.72

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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.