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Finding the Fourth Proportional to 488.40, 731.48 and 282.46

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Solution

The fourth proportional to 488.40, 731.48 and 282.46 is: 423.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    488.40 : 731.48 = 282.46 : x
  2. Step 2: Convert to fraction form
    488.40/731.48 = 282.46/x
  3. Step 3: Cross multiply
    488.40x = 731.48 × 282.46
  4. Step 4: Simplify right side
    488.40x = 206,613.13
  5. Step 5: Solve for x
    x = 206,613.13/488.40
  6. Step 6: Final answer
    x = 423.04

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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.