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Finding the Fourth Proportional to 237, 355.48 and 80.81

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Solution

The fourth proportional to 237, 355.48 and 80.81 is: 121.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    237 : 355.48 = 80.81 : x
  2. Step 2: Convert to fraction form
    237/355.48 = 80.81/x
  3. Step 3: Cross multiply
    237x = 355.48 × 80.81
  4. Step 4: Simplify right side
    237x = 28,727.23
  5. Step 5: Solve for x
    x = 28,727.23/237
  6. Step 6: Final answer
    x = 121.21

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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.