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Finding the Fourth Proportional to 247.68, 340.92 and 212.56

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Solution

The fourth proportional to 247.68, 340.92 and 212.56 is: 292.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    247.68 : 340.92 = 212.56 : x
  2. Step 2: Convert to fraction form
    247.68/340.92 = 212.56/x
  3. Step 3: Cross multiply
    247.68x = 340.92 × 212.56
  4. Step 4: Simplify right side
    247.68x = 72,465.96
  5. Step 5: Solve for x
    x = 72,465.96/247.68
  6. Step 6: Final answer
    x = 292.58

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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.