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Finding the Fourth Proportional to 446.27, 669.47 and 121.66

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Solution

The fourth proportional to 446.27, 669.47 and 121.66 is: 182.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    446.27 : 669.47 = 121.66 : x
  2. Step 2: Convert to fraction form
    446.27/669.47 = 121.66/x
  3. Step 3: Cross multiply
    446.27x = 669.47 × 121.66
  4. Step 4: Simplify right side
    446.27x = 81,445.44
  5. Step 5: Solve for x
    x = 81,445.44/446.27
  6. Step 6: Final answer
    x = 182.50

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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.