Home / 858,981.20-1,288,471.80-809,992.40

Finding the Fourth Proportional to 858,981.20, 1,288,471.80 and 809,992.40

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Solution

The fourth proportional to 858,981.20, 1,288,471.80 and 809,992.40 is: 1,214,988.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    858,981.20 : 1,288,471.80 = 809,992.40 : x
  2. Step 2: Convert to fraction form
    858,981.20/1,288,471.80 = 809,992.40/x
  3. Step 3: Cross multiply
    858,981.20x = 1,288,471.80 × 809,992.40
  4. Step 4: Simplify right side
    858,981.20x = 1,043,652,365,614.32
  5. Step 5: Solve for x
    x = 1,043,652,365,614.32/858,981.20
  6. Step 6: Final answer
    x = 1,214,988.60

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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.