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Finding the Fourth Proportional to 247.16, 340.35 and 198.11

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Solution

The fourth proportional to 247.16, 340.35 and 198.11 is: 272.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    247.16 : 340.35 = 198.11 : x
  2. Step 2: Convert to fraction form
    247.16/340.35 = 198.11/x
  3. Step 3: Cross multiply
    247.16x = 340.35 × 198.11
  4. Step 4: Simplify right side
    247.16x = 67,426.74
  5. Step 5: Solve for x
    x = 67,426.74/247.16
  6. Step 6: Final answer
    x = 272.81

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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.