Home / 1,284,540.80-1,926,811.20-809,686.40

Finding the Fourth Proportional to 1,284,540.80, 1,926,811.20 and 809,686.40

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Solution

The fourth proportional to 1,284,540.80, 1,926,811.20 and 809,686.40 is: 1,214,529.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,284,540.80 : 1,926,811.20 = 809,686.40 : x
  2. Step 2: Convert to fraction form
    1,284,540.80/1,926,811.20 = 809,686.40/x
  3. Step 3: Cross multiply
    1,284,540.80x = 1,926,811.20 × 809,686.40
  4. Step 4: Simplify right side
    1,284,540.80x = 1,560,112,824,007.68
  5. Step 5: Solve for x
    x = 1,560,112,824,007.68/1,284,540.80
  6. Step 6: Final answer
    x = 1,214,529.60

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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.