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Finding the Fourth Proportional to 343.68, 474.30 and 212.70

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Solution

The fourth proportional to 343.68, 474.30 and 212.70 is: 293.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    343.68 : 474.30 = 212.70 : x
  2. Step 2: Convert to fraction form
    343.68/474.30 = 212.70/x
  3. Step 3: Cross multiply
    343.68x = 474.30 × 212.70
  4. Step 4: Simplify right side
    343.68x = 100,883.61
  5. Step 5: Solve for x
    x = 100,883.61/343.68
  6. Step 6: Final answer
    x = 293.54

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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.