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Finding the Fourth Proportional to 424.59, 636.63 and 193.69

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Solution

The fourth proportional to 424.59, 636.63 and 193.69 is: 290.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    424.59 : 636.63 = 193.69 : x
  2. Step 2: Convert to fraction form
    424.59/636.63 = 193.69/x
  3. Step 3: Cross multiply
    424.59x = 636.63 × 193.69
  4. Step 4: Simplify right side
    424.59x = 123,308.86
  5. Step 5: Solve for x
    x = 123,308.86/424.59
  6. Step 6: Final answer
    x = 290.42

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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.