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Finding the Fourth Proportional to 424.48, 636.92 and 309.04

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Solution

The fourth proportional to 424.48, 636.92 and 309.04 is: 463.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    424.48 : 636.92 = 309.04 : x
  2. Step 2: Convert to fraction form
    424.48/636.92 = 309.04/x
  3. Step 3: Cross multiply
    424.48x = 636.92 × 309.04
  4. Step 4: Simplify right side
    424.48x = 196,833.76
  5. Step 5: Solve for x
    x = 196,833.76/424.48
  6. Step 6: Final answer
    x = 463.71

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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.