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Finding the Fourth Proportional to 283.95, 391.88 and 159.61

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Solution

The fourth proportional to 283.95, 391.88 and 159.61 is: 220.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    283.95 : 391.88 = 159.61 : x
  2. Step 2: Convert to fraction form
    283.95/391.88 = 159.61/x
  3. Step 3: Cross multiply
    283.95x = 391.88 × 159.61
  4. Step 4: Simplify right side
    283.95x = 62,547.77
  5. Step 5: Solve for x
    x = 62,547.77/283.95
  6. Step 6: Final answer
    x = 220.28

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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.