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Finding the Fourth Proportional to 237.80, 356.80 and 129.56

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Solution

The fourth proportional to 237.80, 356.80 and 129.56 is: 194.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    237.80 : 356.80 = 129.56 : x
  2. Step 2: Convert to fraction form
    237.80/356.80 = 129.56/x
  3. Step 3: Cross multiply
    237.80x = 356.80 × 129.56
  4. Step 4: Simplify right side
    237.80x = 46,227.01
  5. Step 5: Solve for x
    x = 46,227.01/237.80
  6. Step 6: Final answer
    x = 194.39

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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.