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Finding the Fourth Proportional to 283.61, 391.42 and 159.30

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Solution

The fourth proportional to 283.61, 391.42 and 159.30 is: 219.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    283.61 : 391.42 = 159.30 : x
  2. Step 2: Convert to fraction form
    283.61/391.42 = 159.30/x
  3. Step 3: Cross multiply
    283.61x = 391.42 × 159.30
  4. Step 4: Simplify right side
    283.61x = 62,353.60
  5. Step 5: Solve for x
    x = 62,353.60/283.61
  6. Step 6: Final answer
    x = 219.86

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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.