Home / 639,995.20-882,919.84-449,133.28

Finding the Fourth Proportional to 639,995.20, 882,919.84 and 449,133.28

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Solution

The fourth proportional to 639,995.20, 882,919.84 and 449,133.28 is: 619,611.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,995.20 : 882,919.84 = 449,133.28 : x
  2. Step 2: Convert to fraction form
    639,995.20/882,919.84 = 449,133.28/x
  3. Step 3: Cross multiply
    639,995.20x = 882,919.84 × 449,133.28
  4. Step 4: Simplify right side
    639,995.20x = 396,548,683,716.28
  5. Step 5: Solve for x
    x = 396,548,683,716.28/639,995.20
  6. Step 6: Final answer
    x = 619,611.97

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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.