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Finding the Fourth Proportional to 446.38, 669.18 and 172.66

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Solution

The fourth proportional to 446.38, 669.18 and 172.66 is: 258.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    446.38 : 669.18 = 172.66 : x
  2. Step 2: Convert to fraction form
    446.38/669.18 = 172.66/x
  3. Step 3: Cross multiply
    446.38x = 669.18 × 172.66
  4. Step 4: Simplify right side
    446.38x = 115,540.62
  5. Step 5: Solve for x
    x = 115,540.62/446.38
  6. Step 6: Final answer
    x = 258.84

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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.