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Finding the Fourth Proportional to 424.06, 636.45 and 287.29

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Solution

The fourth proportional to 424.06, 636.45 and 287.29 is: 431.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    424.06 : 636.45 = 287.29 : x
  2. Step 2: Convert to fraction form
    424.06/636.45 = 287.29/x
  3. Step 3: Cross multiply
    424.06x = 636.45 × 287.29
  4. Step 4: Simplify right side
    424.06x = 182,845.72
  5. Step 5: Solve for x
    x = 182,845.72/424.06
  6. Step 6: Final answer
    x = 431.18

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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.