Home / 664,489.20-996,733.80-309,539.10

Finding the Fourth Proportional to 664,489.20, 996,733.80 and 309,539.10

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Solution

The fourth proportional to 664,489.20, 996,733.80 and 309,539.10 is: 464,308.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,489.20 : 996,733.80 = 309,539.10 : x
  2. Step 2: Convert to fraction form
    664,489.20/996,733.80 = 309,539.10/x
  3. Step 3: Cross multiply
    664,489.20x = 996,733.80 × 309,539.10
  4. Step 4: Simplify right side
    664,489.20x = 308,528,083,391.58
  5. Step 5: Solve for x
    x = 308,528,083,391.58/664,489.20
  6. Step 6: Final answer
    x = 464,308.65

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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.