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Finding the Fourth Proportional to 237.26, 355.35 and 115.31

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Solution

The fourth proportional to 237.26, 355.35 and 115.31 is: 172.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    237.26 : 355.35 = 115.31 : x
  2. Step 2: Convert to fraction form
    237.26/355.35 = 115.31/x
  3. Step 3: Cross multiply
    237.26x = 355.35 × 115.31
  4. Step 4: Simplify right side
    237.26x = 40,973.63
  5. Step 5: Solve for x
    x = 40,973.63/237.26
  6. Step 6: Final answer
    x = 172.70

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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.