Home / 819,453.12-1,229,218.80-398,227.20

Finding the Fourth Proportional to 819,453.12, 1,229,218.80 and 398,227.20

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Solution

The fourth proportional to 819,453.12, 1,229,218.80 and 398,227.20 is: 597,359.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    819,453.12 : 1,229,218.80 = 398,227.20 : x
  2. Step 2: Convert to fraction form
    819,453.12/1,229,218.80 = 398,227.20/x
  3. Step 3: Cross multiply
    819,453.12x = 1,229,218.80 × 398,227.20
  4. Step 4: Simplify right side
    819,453.12x = 489,508,360,911.36
  5. Step 5: Solve for x
    x = 489,508,360,911.36/819,453.12
  6. Step 6: Final answer
    x = 597,359.81

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Double scale
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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.