Home / 764,885.05-1,055,561.27-420,729.84

Finding the Fourth Proportional to 764,885.05, 1,055,561.27 and 420,729.84

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Solution

The fourth proportional to 764,885.05, 1,055,561.27 and 420,729.84 is: 580,618.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    764,885.05 : 1,055,561.27 = 420,729.84 : x
  2. Step 2: Convert to fraction form
    764,885.05/1,055,561.27 = 420,729.84/x
  3. Step 3: Cross multiply
    764,885.05x = 1,055,561.27 × 420,729.84
  4. Step 4: Simplify right side
    764,885.05x = 444,106,121,603.06
  5. Step 5: Solve for x
    x = 444,106,121,603.06/764,885.05
  6. Step 6: Final answer
    x = 580,618.13

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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.