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Finding the Fourth Proportional to 178.61, 246.65 and 171.92

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Solution

The fourth proportional to 178.61, 246.65 and 171.92 is: 237.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    178.61 : 246.65 = 171.92 : x
  2. Step 2: Convert to fraction form
    178.61/246.65 = 171.92/x
  3. Step 3: Cross multiply
    178.61x = 246.65 × 171.92
  4. Step 4: Simplify right side
    178.61x = 42,403.83
  5. Step 5: Solve for x
    x = 42,403.83/178.61
  6. Step 6: Final answer
    x = 237.42

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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.