Home / 820,121.20-1,229,951.40-259,327.60

Finding the Fourth Proportional to 820,121.20, 1,229,951.40 and 259,327.60

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Solution

The fourth proportional to 820,121.20, 1,229,951.40 and 259,327.60 is: 388,918.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    820,121.20 : 1,229,951.40 = 259,327.60 : x
  2. Step 2: Convert to fraction form
    820,121.20/1,229,951.40 = 259,327.60/x
  3. Step 3: Cross multiply
    820,121.20x = 1,229,951.40 × 259,327.60
  4. Step 4: Simplify right side
    820,121.20x = 318,960,344,678.64
  5. Step 5: Solve for x
    x = 318,960,344,678.64/820,121.20
  6. Step 6: Final answer
    x = 388,918.55

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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.