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Finding the Fourth Proportional to 488.30, 731.48 and 282.74

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Solution

The fourth proportional to 488.30, 731.48 and 282.74 is: 423.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    488.30 : 731.48 = 282.74 : x
  2. Step 2: Convert to fraction form
    488.30/731.48 = 282.74/x
  3. Step 3: Cross multiply
    488.30x = 731.48 × 282.74
  4. Step 4: Simplify right side
    488.30x = 206,818.66
  5. Step 5: Solve for x
    x = 206,818.66/488.30
  6. Step 6: Final answer
    x = 423.55

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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.