Home / 664,493.20-996,739.80-309,543.10

Finding the Fourth Proportional to 664,493.20, 996,739.80 and 309,543.10

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Solution

The fourth proportional to 664,493.20, 996,739.80 and 309,543.10 is: 464,314.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,493.20 : 996,739.80 = 309,543.10 : x
  2. Step 2: Convert to fraction form
    664,493.20/996,739.80 = 309,543.10/x
  3. Step 3: Cross multiply
    664,493.20x = 996,739.80 × 309,543.10
  4. Step 4: Simplify right side
    664,493.20x = 308,533,927,585.38
  5. Step 5: Solve for x
    x = 308,533,927,585.38/664,493.20
  6. Step 6: Final answer
    x = 464,314.65

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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.