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Finding the Fourth Proportional to 424.76, 636.77 and 229.64

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Solution

The fourth proportional to 424.76, 636.77 and 229.64 is: 344.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    424.76 : 636.77 = 229.64 : x
  2. Step 2: Convert to fraction form
    424.76/636.77 = 229.64/x
  3. Step 3: Cross multiply
    424.76x = 636.77 × 229.64
  4. Step 4: Simplify right side
    424.76x = 146,230.03
  5. Step 5: Solve for x
    x = 146,230.03/424.76
  6. Step 6: Final answer
    x = 344.27

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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.