Home / 820,220.80-1,231,643.40-620,766.40

Finding the Fourth Proportional to 820,220.80, 1,231,643.40 and 620,766.40

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Solution

The fourth proportional to 820,220.80, 1,231,643.40 and 620,766.40 is: 932,142.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    820,220.80 : 1,231,643.40 = 620,766.40 : x
  2. Step 2: Convert to fraction form
    820,220.80/1,231,643.40 = 620,766.40/x
  3. Step 3: Cross multiply
    820,220.80x = 1,231,643.40 × 620,766.40
  4. Step 4: Simplify right side
    820,220.80x = 764,562,839,501.76
  5. Step 5: Solve for x
    x = 764,562,839,501.76/820,220.80
  6. Step 6: Final answer
    x = 932,142.71

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1.5x scale

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.