Home / 679,311.28-1,019,425.14-279,943.20

Finding the Fourth Proportional to 679,311.28, 1,019,425.14 and 279,943.20

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Solution

The fourth proportional to 679,311.28, 1,019,425.14 and 279,943.20 is: 420,103.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    679,311.28 : 1,019,425.14 = 279,943.20 : x
  2. Step 2: Convert to fraction form
    679,311.28/1,019,425.14 = 279,943.20/x
  3. Step 3: Cross multiply
    679,311.28x = 1,019,425.14 × 279,943.20
  4. Step 4: Simplify right side
    679,311.28x = 285,381,135,852.05
  5. Step 5: Solve for x
    x = 285,381,135,852.05/679,311.28
  6. Step 6: Final answer
    x = 420,103.63

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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.