Home / 819,018.43-1,228,589.84-279,106.90

Finding the Fourth Proportional to 819,018.43, 1,228,589.84 and 279,106.90

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Solution

The fourth proportional to 819,018.43, 1,228,589.84 and 279,106.90 is: 418,681.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    819,018.43 : 1,228,589.84 = 279,106.90 : x
  2. Step 2: Convert to fraction form
    819,018.43/1,228,589.84 = 279,106.90/x
  3. Step 3: Cross multiply
    819,018.43x = 1,228,589.84 × 279,106.90
  4. Step 4: Simplify right side
    819,018.43x = 342,907,901,613.90
  5. Step 5: Solve for x
    x = 342,907,901,613.90/819,018.43
  6. Step 6: Final answer
    x = 418,681.54

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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.