Home / 426,380.07-639,971.97-313,716.78

Finding the Fourth Proportional to 426,380.07, 639,971.97 and 313,716.78

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Solution

The fourth proportional to 426,380.07, 639,971.97 and 313,716.78 is: 470,870.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,380.07 : 639,971.97 = 313,716.78 : x
  2. Step 2: Convert to fraction form
    426,380.07/639,971.97 = 313,716.78/x
  3. Step 3: Cross multiply
    426,380.07x = 639,971.97 × 313,716.78
  4. Step 4: Simplify right side
    426,380.07x = 200,769,945,718.66
  5. Step 5: Solve for x
    x = 200,769,945,718.66/426,380.07
  6. Step 6: Final answer
    x = 470,870.85

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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.