Home / 678,685.82-1,016,478.39-323,949.56

Finding the Fourth Proportional to 678,685.82, 1,016,478.39 and 323,949.56

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Solution

The fourth proportional to 678,685.82, 1,016,478.39 and 323,949.56 is: 485,184.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,685.82 : 1,016,478.39 = 323,949.56 : x
  2. Step 2: Convert to fraction form
    678,685.82/1,016,478.39 = 323,949.56/x
  3. Step 3: Cross multiply
    678,685.82x = 1,016,478.39 × 323,949.56
  4. Step 4: Simplify right side
    678,685.82x = 329,287,727,190.01
  5. Step 5: Solve for x
    x = 329,287,727,190.01/678,685.82
  6. Step 6: Final answer
    x = 485,184.33

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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.