Home / 856,251.88-1,283,449.40-428,757.11

Finding the Fourth Proportional to 856,251.88, 1,283,449.40 and 428,757.11

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Solution

The fourth proportional to 856,251.88, 1,283,449.40 and 428,757.11 is: 642,670.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    856,251.88 : 1,283,449.40 = 428,757.11 : x
  2. Step 2: Convert to fraction form
    856,251.88/1,283,449.40 = 428,757.11/x
  3. Step 3: Cross multiply
    856,251.88x = 1,283,449.40 × 428,757.11
  4. Step 4: Simplify right side
    856,251.88x = 550,288,047,014.20
  5. Step 5: Solve for x
    x = 550,288,047,014.20/856,251.88
  6. Step 6: Final answer
    x = 642,670.76

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.