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Finding the Fourth Proportional to 519,388.41, 780,452.57 and 279,679.55

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Solution

The fourth proportional to 519,388.41, 780,452.57 and 279,679.55 is: 420,257.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,388.41 : 780,452.57 = 279,679.55 : x
  2. Step 2: Convert to fraction form
    519,388.41/780,452.57 = 279,679.55/x
  3. Step 3: Cross multiply
    519,388.41x = 780,452.57 × 279,679.55
  4. Step 4: Simplify right side
    519,388.41x = 218,276,618,273.28
  5. Step 5: Solve for x
    x = 218,276,618,273.28/519,388.41
  6. Step 6: Final answer
    x = 420,257.01

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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.