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Finding the Fourth Proportional to 283.60, 391.31 and 159.26

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Solution

The fourth proportional to 283.60, 391.31 and 159.26 is: 219.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    283.60 : 391.31 = 159.26 : x
  2. Step 2: Convert to fraction form
    283.60/391.31 = 159.26/x
  3. Step 3: Cross multiply
    283.60x = 391.31 × 159.26
  4. Step 4: Simplify right side
    283.60x = 62,318.61
  5. Step 5: Solve for x
    x = 62,318.61/283.60
  6. Step 6: Final answer
    x = 219.74

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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.