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Finding the Fourth Proportional to 488.65, 731.81 and 282.79

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Solution

The fourth proportional to 488.65, 731.81 and 282.79 is: 423.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    488.65 : 731.81 = 282.79 : x
  2. Step 2: Convert to fraction form
    488.65/731.81 = 282.79/x
  3. Step 3: Cross multiply
    488.65x = 731.81 × 282.79
  4. Step 4: Simplify right side
    488.65x = 206,948.55
  5. Step 5: Solve for x
    x = 206,948.55/488.65
  6. Step 6: Final answer
    x = 423.51

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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.