Home / 858,986.70-1,288,480.05-809,997.90

Finding the Fourth Proportional to 858,986.70, 1,288,480.05 and 809,997.90

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Solution

The fourth proportional to 858,986.70, 1,288,480.05 and 809,997.90 is: 1,214,996.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    858,986.70 : 1,288,480.05 = 809,997.90 : x
  2. Step 2: Convert to fraction form
    858,986.70/1,288,480.05 = 809,997.90/x
  3. Step 3: Cross multiply
    858,986.70x = 1,288,480.05 × 809,997.90
  4. Step 4: Simplify right side
    858,986.70x = 1,043,666,134,691.90
  5. Step 5: Solve for x
    x = 1,043,666,134,691.90/858,986.70
  6. Step 6: Final answer
    x = 1,214,996.85

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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.