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Finding the Fourth Proportional to 449.71, 675.92 and 440.15

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Solution

The fourth proportional to 449.71, 675.92 and 440.15 is: 661.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    449.71 : 675.92 = 440.15 : x
  2. Step 2: Convert to fraction form
    449.71/675.92 = 440.15/x
  3. Step 3: Cross multiply
    449.71x = 675.92 × 440.15
  4. Step 4: Simplify right side
    449.71x = 297,503.91
  5. Step 5: Solve for x
    x = 297,503.91/449.71
  6. Step 6: Final answer
    x = 661.55

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.