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Finding the Fourth Proportional to 237.68, 356.14 and 121.79

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Solution

The fourth proportional to 237.68, 356.14 and 121.79 is: 182.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    237.68 : 356.14 = 121.79 : x
  2. Step 2: Convert to fraction form
    237.68/356.14 = 121.79/x
  3. Step 3: Cross multiply
    237.68x = 356.14 × 121.79
  4. Step 4: Simplify right side
    237.68x = 43,374.29
  5. Step 5: Solve for x
    x = 43,374.29/237.68
  6. Step 6: Final answer
    x = 182.49

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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.