Home / 764,712.76-1,055,330.70-420,575.29

Finding the Fourth Proportional to 764,712.76, 1,055,330.70 and 420,575.29

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Solution

The fourth proportional to 764,712.76, 1,055,330.70 and 420,575.29 is: 580,408.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    764,712.76 : 1,055,330.70 = 420,575.29 : x
  2. Step 2: Convert to fraction form
    764,712.76/1,055,330.70 = 420,575.29/x
  3. Step 3: Cross multiply
    764,712.76x = 1,055,330.70 × 420,575.29
  4. Step 4: Simplify right side
    764,712.76x = 443,846,015,198.40
  5. Step 5: Solve for x
    x = 443,846,015,198.40/764,712.76
  6. Step 6: Final answer
    x = 580,408.80

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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.