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Finding the Fourth Proportional to 345,939.80, 518,909.70 and 329,610.20

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Solution

The fourth proportional to 345,939.80, 518,909.70 and 329,610.20 is: 494,415.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    345,939.80 : 518,909.70 = 329,610.20 : x
  2. Step 2: Convert to fraction form
    345,939.80/518,909.70 = 329,610.20/x
  3. Step 3: Cross multiply
    345,939.80x = 518,909.70 × 329,610.20
  4. Step 4: Simplify right side
    345,939.80x = 171,037,929,998.94
  5. Step 5: Solve for x
    x = 171,037,929,998.94/345,939.80
  6. Step 6: Final answer
    x = 494,415.30

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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.