Home / 858,980.70-1,288,471.05-809,991.90

Finding the Fourth Proportional to 858,980.70, 1,288,471.05 and 809,991.90

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Solution

The fourth proportional to 858,980.70, 1,288,471.05 and 809,991.90 is: 1,214,987.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    858,980.70 : 1,288,471.05 = 809,991.90 : x
  2. Step 2: Convert to fraction form
    858,980.70/1,288,471.05 = 809,991.90/x
  3. Step 3: Cross multiply
    858,980.70x = 1,288,471.05 × 809,991.90
  4. Step 4: Simplify right side
    858,980.70x = 1,043,651,113,884.50
  5. Step 5: Solve for x
    x = 1,043,651,113,884.50/858,980.70
  6. Step 6: Final answer
    x = 1,214,987.85

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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.