Home / 426,786.46-639,627.80-319,327.30

Finding the Fourth Proportional to 426,786.46, 639,627.80 and 319,327.30

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Solution

The fourth proportional to 426,786.46, 639,627.80 and 319,327.30 is: 478,578.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,786.46 : 639,627.80 = 319,327.30 : x
  2. Step 2: Convert to fraction form
    426,786.46/639,627.80 = 319,327.30/x
  3. Step 3: Cross multiply
    426,786.46x = 639,627.80 × 319,327.30
  4. Step 4: Simplify right side
    426,786.46x = 204,250,618,378.94
  5. Step 5: Solve for x
    x = 204,250,618,378.94/426,786.46
  6. Step 6: Final answer
    x = 478,578.02

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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.