Home / 820,930.60-1,231,280.70-260,021.80

Finding the Fourth Proportional to 820,930.60, 1,231,280.70 and 260,021.80

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Solution

The fourth proportional to 820,930.60, 1,231,280.70 and 260,021.80 is: 389,996.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    820,930.60 : 1,231,280.70 = 260,021.80 : x
  2. Step 2: Convert to fraction form
    820,930.60/1,231,280.70 = 260,021.80/x
  3. Step 3: Cross multiply
    820,930.60x = 1,231,280.70 × 260,021.80
  4. Step 4: Simplify right side
    820,930.60x = 320,159,823,919.26
  5. Step 5: Solve for x
    x = 320,159,823,919.26/820,930.60
  6. Step 6: Final answer
    x = 389,996.21

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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.