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Finding the Fourth Proportional to 3,982.12, 5,973.18 and 1,672.12

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Solution

The fourth proportional to 3,982.12, 5,973.18 and 1,672.12 is: 2,508.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,982.12 : 5,973.18 = 1,672.12 : x
  2. Step 2: Convert to fraction form
    3,982.12/5,973.18 = 1,672.12/x
  3. Step 3: Cross multiply
    3,982.12x = 5,973.18 × 1,672.12
  4. Step 4: Simplify right side
    3,982.12x = 9,987,873.74
  5. Step 5: Solve for x
    x = 9,987,873.74/3,982.12
  6. Step 6: Final answer
    x = 2,508.18

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Similar ratio
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1.5x scale

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.