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Finding the Fourth Proportional to 283.31, 424.07 and 218.56

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Solution

The fourth proportional to 283.31, 424.07 and 218.56 is: 327.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    283.31 : 424.07 = 218.56 : x
  2. Step 2: Convert to fraction form
    283.31/424.07 = 218.56/x
  3. Step 3: Cross multiply
    283.31x = 424.07 × 218.56
  4. Step 4: Simplify right side
    283.31x = 92,684.74
  5. Step 5: Solve for x
    x = 92,684.74/283.31
  6. Step 6: Final answer
    x = 327.15

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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.