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Finding the Fourth Proportional to 163.76, 246.48 and 143.91

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Solution

The fourth proportional to 163.76, 246.48 and 143.91 is: 216.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    163.76 : 246.48 = 143.91 : x
  2. Step 2: Convert to fraction form
    163.76/246.48 = 143.91/x
  3. Step 3: Cross multiply
    163.76x = 246.48 × 143.91
  4. Step 4: Simplify right side
    163.76x = 35,470.40
  5. Step 5: Solve for x
    x = 35,470.40/163.76
  6. Step 6: Final answer
    x = 216.61

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.