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Finding the Fourth Proportional to 304.43, 420.20 and 249.76

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Solution

The fourth proportional to 304.43, 420.20 and 249.76 is: 344.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    304.43 : 420.20 = 249.76 : x
  2. Step 2: Convert to fraction form
    304.43/420.20 = 249.76/x
  3. Step 3: Cross multiply
    304.43x = 420.20 × 249.76
  4. Step 4: Simplify right side
    304.43x = 104,948.53
  5. Step 5: Solve for x
    x = 104,948.53/304.43
  6. Step 6: Final answer
    x = 344.73

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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.