Home / 678,879.43-1,016,769.11-324,142.56

Finding the Fourth Proportional to 678,879.43, 1,016,769.11 and 324,142.56

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Solution

The fourth proportional to 678,879.43, 1,016,769.11 and 324,142.56 is: 485,473.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,879.43 : 1,016,769.11 = 324,142.56 : x
  2. Step 2: Convert to fraction form
    678,879.43/1,016,769.11 = 324,142.56/x
  3. Step 3: Cross multiply
    678,879.43x = 1,016,769.11 × 324,142.56
  4. Step 4: Simplify right side
    678,879.43x = 329,578,140,623.61
  5. Step 5: Solve for x
    x = 329,578,140,623.61/678,879.43
  6. Step 6: Final answer
    x = 485,473.75

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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.