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Finding the Fourth Proportional to 283.68, 391.43 and 159.31

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Solution

The fourth proportional to 283.68, 391.43 and 159.31 is: 219.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    283.68 : 391.43 = 159.31 : x
  2. Step 2: Convert to fraction form
    283.68/391.43 = 159.31/x
  3. Step 3: Cross multiply
    283.68x = 391.43 × 159.31
  4. Step 4: Simplify right side
    283.68x = 62,359.60
  5. Step 5: Solve for x
    x = 62,359.60/283.68
  6. Step 6: Final answer
    x = 219.82

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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.