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Finding the Fourth Proportional to 155.47, 232.84 and 131.17

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Solution

The fourth proportional to 155.47, 232.84 and 131.17 is: 196.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    155.47 : 232.84 = 131.17 : x
  2. Step 2: Convert to fraction form
    155.47/232.84 = 131.17/x
  3. Step 3: Cross multiply
    155.47x = 232.84 × 131.17
  4. Step 4: Simplify right side
    155.47x = 30,541.62
  5. Step 5: Solve for x
    x = 30,541.62/155.47
  6. Step 6: Final answer
    x = 196.45

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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.