Home / 764,982.55-1,055,670.09-420,811.07

Finding the Fourth Proportional to 764,982.55, 1,055,670.09 and 420,811.07

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Solution

The fourth proportional to 764,982.55, 1,055,670.09 and 420,811.07 is: 580,716.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    764,982.55 : 1,055,670.09 = 420,811.07 : x
  2. Step 2: Convert to fraction form
    764,982.55/1,055,670.09 = 420,811.07/x
  3. Step 3: Cross multiply
    764,982.55x = 1,055,670.09 × 420,811.07
  4. Step 4: Simplify right side
    764,982.55x = 444,237,660,139.90
  5. Step 5: Solve for x
    x = 444,237,660,139.90/764,982.55
  6. Step 6: Final answer
    x = 580,716.07

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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.