Home / 3,218.18-4,440.68-1,891.40

Finding the Fourth Proportional to 3,218.18, 4,440.68 and 1,891.40

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Solution

The fourth proportional to 3,218.18, 4,440.68 and 1,891.40 is: 2,609.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,218.18 : 4,440.68 = 1,891.40 : x
  2. Step 2: Convert to fraction form
    3,218.18/4,440.68 = 1,891.40/x
  3. Step 3: Cross multiply
    3,218.18x = 4,440.68 × 1,891.40
  4. Step 4: Simplify right side
    3,218.18x = 8,399,103.80
  5. Step 5: Solve for x
    x = 8,399,103.80/3,218.18
  6. Step 6: Final answer
    x = 2,609.89

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Half scale
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Double scale
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1.5x scale

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.