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Finding the Fourth Proportional to 343.89, 474.36 and 212.87

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Solution

The fourth proportional to 343.89, 474.36 and 212.87 is: 293.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    343.89 : 474.36 = 212.87 : x
  2. Step 2: Convert to fraction form
    343.89/474.36 = 212.87/x
  3. Step 3: Cross multiply
    343.89x = 474.36 × 212.87
  4. Step 4: Simplify right side
    343.89x = 100,974.64
  5. Step 5: Solve for x
    x = 100,974.64/343.89
  6. Step 6: Final answer
    x = 293.62

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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.