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Finding the Fourth Proportional to 512,422.80, 768,634.20 and 179,998.80

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Solution

The fourth proportional to 512,422.80, 768,634.20 and 179,998.80 is: 269,998.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    512,422.80 : 768,634.20 = 179,998.80 : x
  2. Step 2: Convert to fraction form
    512,422.80/768,634.20 = 179,998.80/x
  3. Step 3: Cross multiply
    512,422.80x = 768,634.20 × 179,998.80
  4. Step 4: Simplify right side
    512,422.80x = 138,353,233,638.96
  5. Step 5: Solve for x
    x = 138,353,233,638.96/512,422.80
  6. Step 6: Final answer
    x = 269,998.20

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1.5x scale

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.