Home / 831,520.80-1,248,010.20-494,139.60

Finding the Fourth Proportional to 831,520.80, 1,248,010.20 and 494,139.60

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Solution

The fourth proportional to 831,520.80, 1,248,010.20 and 494,139.60 is: 741,642.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    831,520.80 : 1,248,010.20 = 494,139.60 : x
  2. Step 2: Convert to fraction form
    831,520.80/1,248,010.20 = 494,139.60/x
  3. Step 3: Cross multiply
    831,520.80x = 1,248,010.20 × 494,139.60
  4. Step 4: Simplify right side
    831,520.80x = 616,691,261,023.92
  5. Step 5: Solve for x
    x = 616,691,261,023.92/831,520.80
  6. Step 6: Final answer
    x = 741,642.62

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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.