Home / 858,869.85-1,288,304.78-780,137.85

Finding the Fourth Proportional to 858,869.85, 1,288,304.78 and 780,137.85

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Solution

The fourth proportional to 858,869.85, 1,288,304.78 and 780,137.85 is: 1,170,206.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    858,869.85 : 1,288,304.78 = 780,137.85 : x
  2. Step 2: Convert to fraction form
    858,869.85/1,288,304.78 = 780,137.85/x
  3. Step 3: Cross multiply
    858,869.85x = 1,288,304.78 × 780,137.85
  4. Step 4: Simplify right side
    858,869.85x = 1,005,055,317,313.23
  5. Step 5: Solve for x
    x = 1,005,055,317,313.23/858,869.85
  6. Step 6: Final answer
    x = 1,170,206.78

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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.