Home / 764,628.82-1,055,214.30-420,478.86

Finding the Fourth Proportional to 764,628.82, 1,055,214.30 and 420,478.86

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Solution

The fourth proportional to 764,628.82, 1,055,214.30 and 420,478.86 is: 580,275.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    764,628.82 : 1,055,214.30 = 420,478.86 : x
  2. Step 2: Convert to fraction form
    764,628.82/1,055,214.30 = 420,478.86/x
  3. Step 3: Cross multiply
    764,628.82x = 1,055,214.30 × 420,478.86
  4. Step 4: Simplify right side
    764,628.82x = 443,695,305,919.70
  5. Step 5: Solve for x
    x = 443,695,305,919.70/764,628.82
  6. Step 6: Final answer
    x = 580,275.42

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1.5x scale

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.