Home / 820,727.20-1,229,708.40-399,095.20

Finding the Fourth Proportional to 820,727.20, 1,229,708.40 and 399,095.20

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Solution

The fourth proportional to 820,727.20, 1,229,708.40 and 399,095.20 is: 597,970.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    820,727.20 : 1,229,708.40 = 399,095.20 : x
  2. Step 2: Convert to fraction form
    820,727.20/1,229,708.40 = 399,095.20/x
  3. Step 3: Cross multiply
    820,727.20x = 1,229,708.40 × 399,095.20
  4. Step 4: Simplify right side
    820,727.20x = 490,770,719,839.68
  5. Step 5: Solve for x
    x = 490,770,719,839.68/820,727.20
  6. Step 6: Final answer
    x = 597,970.58

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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.