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Finding the Fourth Proportional to 178.41, 246.20 and 145.61

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Solution

The fourth proportional to 178.41, 246.20 and 145.61 is: 200.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    178.41 : 246.20 = 145.61 : x
  2. Step 2: Convert to fraction form
    178.41/246.20 = 145.61/x
  3. Step 3: Cross multiply
    178.41x = 246.20 × 145.61
  4. Step 4: Simplify right side
    178.41x = 35,849.18
  5. Step 5: Solve for x
    x = 35,849.18/178.41
  6. Step 6: Final answer
    x = 200.94

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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.