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Finding the Fourth Proportional to 178.71, 246.68 and 147.69

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Solution

The fourth proportional to 178.71, 246.68 and 147.69 is: 203.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    178.71 : 246.68 = 147.69 : x
  2. Step 2: Convert to fraction form
    178.71/246.68 = 147.69/x
  3. Step 3: Cross multiply
    178.71x = 246.68 × 147.69
  4. Step 4: Simplify right side
    178.71x = 36,431.98
  5. Step 5: Solve for x
    x = 36,431.98/178.71
  6. Step 6: Final answer
    x = 203.87

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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.