Home / 820,761.06-1,231,080.12-288,286.80

Finding the Fourth Proportional to 820,761.06, 1,231,080.12 and 288,286.80

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Solution

The fourth proportional to 820,761.06, 1,231,080.12 and 288,286.80 is: 432,408.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    820,761.06 : 1,231,080.12 = 288,286.80 : x
  2. Step 2: Convert to fraction form
    820,761.06/1,231,080.12 = 288,286.80/x
  3. Step 3: Cross multiply
    820,761.06x = 1,231,080.12 × 288,286.80
  4. Step 4: Simplify right side
    820,761.06x = 354,904,148,338.42
  5. Step 5: Solve for x
    x = 354,904,148,338.42/820,761.06
  6. Step 6: Final answer
    x = 432,408.61

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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.