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Finding the Fourth Proportional to 285.74, 394.08 and 195.92

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Solution

The fourth proportional to 285.74, 394.08 and 195.92 is: 270.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    285.74 : 394.08 = 195.92 : x
  2. Step 2: Convert to fraction form
    285.74/394.08 = 195.92/x
  3. Step 3: Cross multiply
    285.74x = 394.08 × 195.92
  4. Step 4: Simplify right side
    285.74x = 77,208.15
  5. Step 5: Solve for x
    x = 77,208.15/285.74
  6. Step 6: Final answer
    x = 270.20

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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.