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Finding the Fourth Proportional to 449.92, 669.42 and 446.41

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Solution

The fourth proportional to 449.92, 669.42 and 446.41 is: 664.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    449.92 : 669.42 = 446.41 : x
  2. Step 2: Convert to fraction form
    449.92/669.42 = 446.41/x
  3. Step 3: Cross multiply
    449.92x = 669.42 × 446.41
  4. Step 4: Simplify right side
    449.92x = 298,835.78
  5. Step 5: Solve for x
    x = 298,835.78/449.92
  6. Step 6: Final answer
    x = 664.20

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.