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Finding the Fourth Proportional to 247.98, 342.05 and 163.92

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Solution

The fourth proportional to 247.98, 342.05 and 163.92 is: 226.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    247.98 : 342.05 = 163.92 : x
  2. Step 2: Convert to fraction form
    247.98/342.05 = 163.92/x
  3. Step 3: Cross multiply
    247.98x = 342.05 × 163.92
  4. Step 4: Simplify right side
    247.98x = 56,068.02
  5. Step 5: Solve for x
    x = 56,068.02/247.98
  6. Step 6: Final answer
    x = 226.10

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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.