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Finding the Fourth Proportional to 449.07, 619.71 and 249.90

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Solution

The fourth proportional to 449.07, 619.71 and 249.90 is: 344.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    449.07 : 619.71 = 249.90 : x
  2. Step 2: Convert to fraction form
    449.07/619.71 = 249.90/x
  3. Step 3: Cross multiply
    449.07x = 619.71 × 249.90
  4. Step 4: Simplify right side
    449.07x = 154,865.53
  5. Step 5: Solve for x
    x = 154,865.53/449.07
  6. Step 6: Final answer
    x = 344.86

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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.