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Finding the Fourth Proportional to 283.83, 391.60 and 218.22

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Solution

The fourth proportional to 283.83, 391.60 and 218.22 is: 301.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    283.83 : 391.60 = 218.22 : x
  2. Step 2: Convert to fraction form
    283.83/391.60 = 218.22/x
  3. Step 3: Cross multiply
    283.83x = 391.60 × 218.22
  4. Step 4: Simplify right side
    283.83x = 85,454.95
  5. Step 5: Solve for x
    x = 85,454.95/283.83
  6. Step 6: Final answer
    x = 301.08

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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.