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Finding the Fourth Proportional to 519,335.31, 780,372.92 and 279,626.44

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Solution

The fourth proportional to 519,335.31, 780,372.92 and 279,626.44 is: 420,177.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,335.31 : 780,372.92 = 279,626.44 : x
  2. Step 2: Convert to fraction form
    519,335.31/780,372.92 = 279,626.44/x
  3. Step 3: Cross multiply
    519,335.31x = 780,372.92 × 279,626.44
  4. Step 4: Simplify right side
    519,335.31x = 218,212,900,240.14
  5. Step 5: Solve for x
    x = 218,212,900,240.14/519,335.31
  6. Step 6: Final answer
    x = 420,177.28

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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.