Home / 718,991.28-992,205.18-396,721.44

Finding the Fourth Proportional to 718,991.28, 992,205.18 and 396,721.44

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Solution

The fourth proportional to 718,991.28, 992,205.18 and 396,721.44 is: 547,474.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    718,991.28 : 992,205.18 = 396,721.44 : x
  2. Step 2: Convert to fraction form
    718,991.28/992,205.18 = 396,721.44/x
  3. Step 3: Cross multiply
    718,991.28x = 992,205.18 × 396,721.44
  4. Step 4: Simplify right side
    718,991.28x = 393,629,067,785.06
  5. Step 5: Solve for x
    x = 393,629,067,785.06/718,991.28
  6. Step 6: Final answer
    x = 547,474.05

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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.