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Finding the Fourth Proportional to 283.59, 425.42 and 211.91

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Solution

The fourth proportional to 283.59, 425.42 and 211.91 is: 317.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    283.59 : 425.42 = 211.91 : x
  2. Step 2: Convert to fraction form
    283.59/425.42 = 211.91/x
  3. Step 3: Cross multiply
    283.59x = 425.42 × 211.91
  4. Step 4: Simplify right side
    283.59x = 90,147.57
  5. Step 5: Solve for x
    x = 90,147.57/283.59
  6. Step 6: Final answer
    x = 317.88

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.