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Finding the Fourth Proportional to 283.64, 391.40 and 159.28

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Solution

The fourth proportional to 283.64, 391.40 and 159.28 is: 219.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    283.64 : 391.40 = 159.28 : x
  2. Step 2: Convert to fraction form
    283.64/391.40 = 159.28/x
  3. Step 3: Cross multiply
    283.64x = 391.40 × 159.28
  4. Step 4: Simplify right side
    283.64x = 62,339.44
  5. Step 5: Solve for x
    x = 62,339.44/283.64
  6. Step 6: Final answer
    x = 219.79

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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.