Home / 764,856.21-1,055,503.68-420,727.40

Finding the Fourth Proportional to 764,856.21, 1,055,503.68 and 420,727.40

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Solution

The fourth proportional to 764,856.21, 1,055,503.68 and 420,727.40 is: 580,604.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    764,856.21 : 1,055,503.68 = 420,727.40 : x
  2. Step 2: Convert to fraction form
    764,856.21/1,055,503.68 = 420,727.40/x
  3. Step 3: Cross multiply
    764,856.21x = 1,055,503.68 × 420,727.40
  4. Step 4: Simplify right side
    764,856.21x = 444,079,313,699.31
  5. Step 5: Solve for x
    x = 444,079,313,699.31/764,856.21
  6. Step 6: Final answer
    x = 580,604.97

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.