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Finding the Fourth Proportional to 285.70, 394.20 and 169.27

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Solution

The fourth proportional to 285.70, 394.20 and 169.27 is: 233.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    285.70 : 394.20 = 169.27 : x
  2. Step 2: Convert to fraction form
    285.70/394.20 = 169.27/x
  3. Step 3: Cross multiply
    285.70x = 394.20 × 169.27
  4. Step 4: Simplify right side
    285.70x = 66,726.23
  5. Step 5: Solve for x
    x = 66,726.23/285.70
  6. Step 6: Final answer
    x = 233.55

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.