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Finding the Fourth Proportional to 424.07, 635.93 and 142.56

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Solution

The fourth proportional to 424.07, 635.93 and 142.56 is: 213.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    424.07 : 635.93 = 142.56 : x
  2. Step 2: Convert to fraction form
    424.07/635.93 = 142.56/x
  3. Step 3: Cross multiply
    424.07x = 635.93 × 142.56
  4. Step 4: Simplify right side
    424.07x = 90,657.47
  5. Step 5: Solve for x
    x = 90,657.47/424.07
  6. Step 6: Final answer
    x = 213.78

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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.