Home / 764,615.70-1,055,236.88-420,512.25

Finding the Fourth Proportional to 764,615.70, 1,055,236.88 and 420,512.25

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Solution

The fourth proportional to 764,615.70, 1,055,236.88 and 420,512.25 is: 580,343.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    764,615.70 : 1,055,236.88 = 420,512.25 : x
  2. Step 2: Convert to fraction form
    764,615.70/1,055,236.88 = 420,512.25/x
  3. Step 3: Cross multiply
    764,615.70x = 1,055,236.88 × 420,512.25
  4. Step 4: Simplify right side
    764,615.70x = 443,740,034,691.78
  5. Step 5: Solve for x
    x = 443,740,034,691.78/764,615.70
  6. Step 6: Final answer
    x = 580,343.87

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Double scale
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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.