Home / 764,739.60-1,147,262.52-428,258.76

Finding the Fourth Proportional to 764,739.60, 1,147,262.52 and 428,258.76

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Solution

The fourth proportional to 764,739.60, 1,147,262.52 and 428,258.76 is: 642,473.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    764,739.60 : 1,147,262.52 = 428,258.76 : x
  2. Step 2: Convert to fraction form
    764,739.60/1,147,262.52 = 428,258.76/x
  3. Step 3: Cross multiply
    764,739.60x = 1,147,262.52 × 428,258.76
  4. Step 4: Simplify right side
    764,739.60x = 491,325,224,209.68
  5. Step 5: Solve for x
    x = 491,325,224,209.68/764,739.60
  6. Step 6: Final answer
    x = 642,473.89

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.