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Finding the Fourth Proportional to 283.77, 391.56 and 157.71

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Solution

The fourth proportional to 283.77, 391.56 and 157.71 is: 217.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    283.77 : 391.56 = 157.71 : x
  2. Step 2: Convert to fraction form
    283.77/391.56 = 157.71/x
  3. Step 3: Cross multiply
    283.77x = 391.56 × 157.71
  4. Step 4: Simplify right side
    283.77x = 61,752.93
  5. Step 5: Solve for x
    x = 61,752.93/283.77
  6. Step 6: Final answer
    x = 217.62

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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.