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Finding the Fourth Proportional to 237.47, 355.72 and 121.57

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Solution

The fourth proportional to 237.47, 355.72 and 121.57 is: 182.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    237.47 : 355.72 = 121.57 : x
  2. Step 2: Convert to fraction form
    237.47/355.72 = 121.57/x
  3. Step 3: Cross multiply
    237.47x = 355.72 × 121.57
  4. Step 4: Simplify right side
    237.47x = 43,243.57
  5. Step 5: Solve for x
    x = 43,243.57/237.47
  6. Step 6: Final answer
    x = 182.10

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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.