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Finding the Fourth Proportional to 343.31, 473.63 and 212.22

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Solution

The fourth proportional to 343.31, 473.63 and 212.22 is: 292.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    343.31 : 473.63 = 212.22 : x
  2. Step 2: Convert to fraction form
    343.31/473.63 = 212.22/x
  3. Step 3: Cross multiply
    343.31x = 473.63 × 212.22
  4. Step 4: Simplify right side
    343.31x = 100,512.70
  5. Step 5: Solve for x
    x = 100,512.70/343.31
  6. Step 6: Final answer
    x = 292.78

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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.