Home / 764,568.09-1,055,126.93-420,386.22

Finding the Fourth Proportional to 764,568.09, 1,055,126.93 and 420,386.22

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Solution

The fourth proportional to 764,568.09, 1,055,126.93 and 420,386.22 is: 580,145.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    764,568.09 : 1,055,126.93 = 420,386.22 : x
  2. Step 2: Convert to fraction form
    764,568.09/1,055,126.93 = 420,386.22/x
  3. Step 3: Cross multiply
    764,568.09x = 1,055,126.93 × 420,386.22
  4. Step 4: Simplify right side
    764,568.09x = 443,560,819,620.97
  5. Step 5: Solve for x
    x = 443,560,819,620.97/764,568.09
  6. Step 6: Final answer
    x = 580,145.61

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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.