Home / 821,086.40-1,231,629.60-485,163.20

Finding the Fourth Proportional to 821,086.40, 1,231,629.60 and 485,163.20

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Solution

The fourth proportional to 821,086.40, 1,231,629.60 and 485,163.20 is: 727,744.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    821,086.40 : 1,231,629.60 = 485,163.20 : x
  2. Step 2: Convert to fraction form
    821,086.40/1,231,629.60 = 485,163.20/x
  3. Step 3: Cross multiply
    821,086.40x = 1,231,629.60 × 485,163.20
  4. Step 4: Simplify right side
    821,086.40x = 597,541,357,950.72
  5. Step 5: Solve for x
    x = 597,541,357,950.72/821,086.40
  6. Step 6: Final answer
    x = 727,744.80

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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.