Home / 764,538.42-1,055,090.10-420,400.56

Finding the Fourth Proportional to 764,538.42, 1,055,090.10 and 420,400.56

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Solution

The fourth proportional to 764,538.42, 1,055,090.10 and 420,400.56 is: 580,167.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    764,538.42 : 1,055,090.10 = 420,400.56 : x
  2. Step 2: Convert to fraction form
    764,538.42/1,055,090.10 = 420,400.56/x
  3. Step 3: Cross multiply
    764,538.42x = 1,055,090.10 × 420,400.56
  4. Step 4: Simplify right side
    764,538.42x = 443,560,468,890.46
  5. Step 5: Solve for x
    x = 443,560,468,890.46/764,538.42
  6. Step 6: Final answer
    x = 580,167.66

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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.