Home / 681,343.68-940,273.22-390,979.79

Finding the Fourth Proportional to 681,343.68, 940,273.22 and 390,979.79

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Solution

The fourth proportional to 681,343.68, 940,273.22 and 390,979.79 is: 539,562.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    681,343.68 : 940,273.22 = 390,979.79 : x
  2. Step 2: Convert to fraction form
    681,343.68/940,273.22 = 390,979.79/x
  3. Step 3: Cross multiply
    681,343.68x = 940,273.22 × 390,979.79
  4. Step 4: Simplify right side
    681,343.68x = 367,627,822,374.31
  5. Step 5: Solve for x
    x = 367,627,822,374.31/681,343.68
  6. Step 6: Final answer
    x = 539,562.97

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.