Home / 664,481.20-996,721.80-309,531.10

Finding the Fourth Proportional to 664,481.20, 996,721.80 and 309,531.10

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Solution

The fourth proportional to 664,481.20, 996,721.80 and 309,531.10 is: 464,296.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,481.20 : 996,721.80 = 309,531.10 : x
  2. Step 2: Convert to fraction form
    664,481.20/996,721.80 = 309,531.10/x
  3. Step 3: Cross multiply
    664,481.20x = 996,721.80 × 309,531.10
  4. Step 4: Simplify right side
    664,481.20x = 308,516,395,147.98
  5. Step 5: Solve for x
    x = 308,516,395,147.98/664,481.20
  6. Step 6: Final answer
    x = 464,296.65

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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.