Home / 261,305,998.20-391,958,997.30-212,933,057.40

Finding the Fourth Proportional to 261,305,998.20, 391,958,997.30 and 212,933,057.40

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Solution

The fourth proportional to 261,305,998.20, 391,958,997.30 and 212,933,057.40 is: 319,399,586.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,305,998.20 : 391,958,997.30 = 212,933,057.40 : x
  2. Step 2: Convert to fraction form
    261,305,998.20/391,958,997.30 = 212,933,057.40/x
  3. Step 3: Cross multiply
    261,305,998.20x = 391,958,997.30 × 212,933,057.40
  4. Step 4: Simplify right side
    261,305,998.20x = 83,461,027,670,527,344
  5. Step 5: Solve for x
    x = 83,461,027,670,527,344/261,305,998.20
  6. Step 6: Final answer
    x = 319,399,586.10

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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.