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Finding the Fourth Proportional to 343.60, 474.21 and 212.62

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Solution

The fourth proportional to 343.60, 474.21 and 212.62 is: 293.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    343.60 : 474.21 = 212.62 : x
  2. Step 2: Convert to fraction form
    343.60/474.21 = 212.62/x
  3. Step 3: Cross multiply
    343.60x = 474.21 × 212.62
  4. Step 4: Simplify right side
    343.60x = 100,826.53
  5. Step 5: Solve for x
    x = 100,826.53/343.60
  6. Step 6: Final answer
    x = 293.44

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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.