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Finding the Fourth Proportional to 498.47, 747.70 and 282.20

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Solution

The fourth proportional to 498.47, 747.70 and 282.20 is: 423.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    498.47 : 747.70 = 282.20 : x
  2. Step 2: Convert to fraction form
    498.47/747.70 = 282.20/x
  3. Step 3: Cross multiply
    498.47x = 747.70 × 282.20
  4. Step 4: Simplify right side
    498.47x = 210,996.50
  5. Step 5: Solve for x
    x = 210,996.50/498.47
  6. Step 6: Final answer
    x = 423.29

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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.