Home / 764,520.40-1,055,040.86-420,377.96

Finding the Fourth Proportional to 764,520.40, 1,055,040.86 and 420,377.96

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Solution

The fourth proportional to 764,520.40, 1,055,040.86 and 420,377.96 is: 580,123.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    764,520.40 : 1,055,040.86 = 420,377.96 : x
  2. Step 2: Convert to fraction form
    764,520.40/1,055,040.86 = 420,377.96/x
  3. Step 3: Cross multiply
    764,520.40x = 1,055,040.86 × 420,377.96
  4. Step 4: Simplify right side
    764,520.40x = 443,515,924,443.45
  5. Step 5: Solve for x
    x = 443,515,924,443.45/764,520.40
  6. Step 6: Final answer
    x = 580,123.07

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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.