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Finding the Fourth Proportional to 182.74, 251.85 and 143.40

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Solution

The fourth proportional to 182.74, 251.85 and 143.40 is: 197.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    182.74 : 251.85 = 143.40 : x
  2. Step 2: Convert to fraction form
    182.74/251.85 = 143.40/x
  3. Step 3: Cross multiply
    182.74x = 251.85 × 143.40
  4. Step 4: Simplify right side
    182.74x = 36,115.29
  5. Step 5: Solve for x
    x = 36,115.29/182.74
  6. Step 6: Final answer
    x = 197.63

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.