Home / 820,931.60-1,231,282.20-260,022.80

Finding the Fourth Proportional to 820,931.60, 1,231,282.20 and 260,022.80

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Solution

The fourth proportional to 820,931.60, 1,231,282.20 and 260,022.80 is: 389,997.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    820,931.60 : 1,231,282.20 = 260,022.80 : x
  2. Step 2: Convert to fraction form
    820,931.60/1,231,282.20 = 260,022.80/x
  3. Step 3: Cross multiply
    820,931.60x = 1,231,282.20 × 260,022.80
  4. Step 4: Simplify right side
    820,931.60x = 320,161,445,234.16
  5. Step 5: Solve for x
    x = 320,161,445,234.16/820,931.60
  6. Step 6: Final answer
    x = 389,997.71

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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.