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Finding the Fourth Proportional to 283.62, 391.18 and 212.64

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Solution

The fourth proportional to 283.62, 391.18 and 212.64 is: 293.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    283.62 : 391.18 = 212.64 : x
  2. Step 2: Convert to fraction form
    283.62/391.18 = 212.64/x
  3. Step 3: Cross multiply
    283.62x = 391.18 × 212.64
  4. Step 4: Simplify right side
    283.62x = 83,180.52
  5. Step 5: Solve for x
    x = 83,180.52/283.62
  6. Step 6: Final answer
    x = 293.28

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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.