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Finding the Fourth Proportional to 285.97, 394.70 and 181.20

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Solution

The fourth proportional to 285.97, 394.70 and 181.20 is: 250.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    285.97 : 394.70 = 181.20 : x
  2. Step 2: Convert to fraction form
    285.97/394.70 = 181.20/x
  3. Step 3: Cross multiply
    285.97x = 394.70 × 181.20
  4. Step 4: Simplify right side
    285.97x = 71,517.45
  5. Step 5: Solve for x
    x = 71,517.45/285.97
  6. Step 6: Final answer
    x = 250.09

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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.