Home / 764,727.57-1,147,244.49-428,246.73

Finding the Fourth Proportional to 764,727.57, 1,147,244.49 and 428,246.73

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Solution

The fourth proportional to 764,727.57, 1,147,244.49 and 428,246.73 is: 642,455.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    764,727.57 : 1,147,244.49 = 428,246.73 : x
  2. Step 2: Convert to fraction form
    764,727.57/1,147,244.49 = 428,246.73/x
  3. Step 3: Cross multiply
    764,727.57x = 1,147,244.49 × 428,246.73
  4. Step 4: Simplify right side
    764,727.57x = 491,303,701,353.02
  5. Step 5: Solve for x
    x = 491,303,701,353.02/764,727.57
  6. Step 6: Final answer
    x = 642,455.85

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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.