Home / 1,321,377.20-1,982,065.79-324,105.20

Finding the Fourth Proportional to 1,321,377.20, 1,982,065.79 and 324,105.20

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Solution

The fourth proportional to 1,321,377.20, 1,982,065.79 and 324,105.20 is: 486,157.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,321,377.20 : 1,982,065.79 = 324,105.20 : x
  2. Step 2: Convert to fraction form
    1,321,377.20/1,982,065.79 = 324,105.20/x
  3. Step 3: Cross multiply
    1,321,377.20x = 1,982,065.79 × 324,105.20
  4. Step 4: Simplify right side
    1,321,377.20x = 642,397,817,750.25
  5. Step 5: Solve for x
    x = 642,397,817,750.25/1,321,377.20
  6. Step 6: Final answer
    x = 486,157.79

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Double scale
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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.