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Finding the Fourth Proportional to 424.14, 636.39 and 231.75

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Solution

The fourth proportional to 424.14, 636.39 and 231.75 is: 347.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    424.14 : 636.39 = 231.75 : x
  2. Step 2: Convert to fraction form
    424.14/636.39 = 231.75/x
  3. Step 3: Cross multiply
    424.14x = 636.39 × 231.75
  4. Step 4: Simplify right side
    424.14x = 147,483.38
  5. Step 5: Solve for x
    x = 147,483.38/424.14
  6. Step 6: Final answer
    x = 347.72

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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.