Home / 819,928.14-1,229,891.88-420,314.04

Finding the Fourth Proportional to 819,928.14, 1,229,891.88 and 420,314.04

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Solution

The fourth proportional to 819,928.14, 1,229,891.88 and 420,314.04 is: 630,470.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    819,928.14 : 1,229,891.88 = 420,314.04 : x
  2. Step 2: Convert to fraction form
    819,928.14/1,229,891.88 = 420,314.04/x
  3. Step 3: Cross multiply
    819,928.14x = 1,229,891.88 × 420,314.04
  4. Step 4: Simplify right side
    819,928.14x = 516,940,824,846.00
  5. Step 5: Solve for x
    x = 516,940,824,846.00/819,928.14
  6. Step 6: Final answer
    x = 630,470.89

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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.