Home / 819,979.74-1,229,120.73-398,732.22

Finding the Fourth Proportional to 819,979.74, 1,229,120.73 and 398,732.22

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Solution

The fourth proportional to 819,979.74, 1,229,120.73 and 398,732.22 is: 597,685.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    819,979.74 : 1,229,120.73 = 398,732.22 : x
  2. Step 2: Convert to fraction form
    819,979.74/1,229,120.73 = 398,732.22/x
  3. Step 3: Cross multiply
    819,979.74x = 1,229,120.73 × 398,732.22
  4. Step 4: Simplify right side
    819,979.74x = 490,090,037,320.92
  5. Step 5: Solve for x
    x = 490,090,037,320.92/819,979.74
  6. Step 6: Final answer
    x = 597,685.54

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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.