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Finding the Fourth Proportional to 445.34, 669.23 and 272.04

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Solution

The fourth proportional to 445.34, 669.23 and 272.04 is: 408.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    445.34 : 669.23 = 272.04 : x
  2. Step 2: Convert to fraction form
    445.34/669.23 = 272.04/x
  3. Step 3: Cross multiply
    445.34x = 669.23 × 272.04
  4. Step 4: Simplify right side
    445.34x = 182,055.97
  5. Step 5: Solve for x
    x = 182,055.97/445.34
  6. Step 6: Final answer
    x = 408.81

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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.