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Finding the Fourth Proportional to 284.10, 391.39 and 218.49

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Solution

The fourth proportional to 284.10, 391.39 and 218.49 is: 301.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    284.10 : 391.39 = 218.49 : x
  2. Step 2: Convert to fraction form
    284.10/391.39 = 218.49/x
  3. Step 3: Cross multiply
    284.10x = 391.39 × 218.49
  4. Step 4: Simplify right side
    284.10x = 85,514.80
  5. Step 5: Solve for x
    x = 85,514.80/284.10
  6. Step 6: Final answer
    x = 301.00

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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.