Home / 764,644.59-1,055,235.85-420,493.48

Finding the Fourth Proportional to 764,644.59, 1,055,235.85 and 420,493.48

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Solution

The fourth proportional to 764,644.59, 1,055,235.85 and 420,493.48 is: 580,295.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    764,644.59 : 1,055,235.85 = 420,493.48 : x
  2. Step 2: Convert to fraction form
    764,644.59/1,055,235.85 = 420,493.48/x
  3. Step 3: Cross multiply
    764,644.59x = 1,055,235.85 × 420,493.48
  4. Step 4: Simplify right side
    764,644.59x = 443,719,791,097.94
  5. Step 5: Solve for x
    x = 443,719,791,097.94/764,644.59
  6. Step 6: Final answer
    x = 580,295.47

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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.