Home / 820,921.60-1,231,267.20-260,012.80

Finding the Fourth Proportional to 820,921.60, 1,231,267.20 and 260,012.80

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Solution

The fourth proportional to 820,921.60, 1,231,267.20 and 260,012.80 is: 389,982.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    820,921.60 : 1,231,267.20 = 260,012.80 : x
  2. Step 2: Convert to fraction form
    820,921.60/1,231,267.20 = 260,012.80/x
  3. Step 3: Cross multiply
    820,921.60x = 1,231,267.20 × 260,012.80
  4. Step 4: Simplify right side
    820,921.60x = 320,145,232,220.16
  5. Step 5: Solve for x
    x = 320,145,232,220.16/820,921.60
  6. Step 6: Final answer
    x = 389,982.71

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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.