Home / 820,219.80-1,231,641.90-620,765.40

Finding the Fourth Proportional to 820,219.80, 1,231,641.90 and 620,765.40

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Solution

The fourth proportional to 820,219.80, 1,231,641.90 and 620,765.40 is: 932,141.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    820,219.80 : 1,231,641.90 = 620,765.40 : x
  2. Step 2: Convert to fraction form
    820,219.80/1,231,641.90 = 620,765.40/x
  3. Step 3: Cross multiply
    820,219.80x = 1,231,641.90 × 620,765.40
  4. Step 4: Simplify right side
    820,219.80x = 764,560,676,710.26
  5. Step 5: Solve for x
    x = 764,560,676,710.26/820,219.80
  6. Step 6: Final answer
    x = 932,141.21

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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.