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Finding the Fourth Proportional to 237.13, 355.80 and 115.40

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Solution

The fourth proportional to 237.13, 355.80 and 115.40 is: 173.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    237.13 : 355.80 = 115.40 : x
  2. Step 2: Convert to fraction form
    237.13/355.80 = 115.40/x
  3. Step 3: Cross multiply
    237.13x = 355.80 × 115.40
  4. Step 4: Simplify right side
    237.13x = 41,057.99
  5. Step 5: Solve for x
    x = 41,057.99/237.13
  6. Step 6: Final answer
    x = 173.14

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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.