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Finding the Fourth Proportional to 337.26, 505.71 and 142.20

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Solution

The fourth proportional to 337.26, 505.71 and 142.20 is: 213.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    337.26 : 505.71 = 142.20 : x
  2. Step 2: Convert to fraction form
    337.26/505.71 = 142.20/x
  3. Step 3: Cross multiply
    337.26x = 505.71 × 142.20
  4. Step 4: Simplify right side
    337.26x = 71,911.96
  5. Step 5: Solve for x
    x = 71,911.96/337.26
  6. Step 6: Final answer
    x = 213.22

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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.