Home / 426,491,999.70-639,737,999.55-196,909,487.70

Finding the Fourth Proportional to 426,491,999.70, 639,737,999.55 and 196,909,487.70

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Solution

The fourth proportional to 426,491,999.70, 639,737,999.55 and 196,909,487.70 is: 295,364,231.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,491,999.70 : 639,737,999.55 = 196,909,487.70 : x
  2. Step 2: Convert to fraction form
    426,491,999.70/639,737,999.55 = 196,909,487.70/x
  3. Step 3: Cross multiply
    426,491,999.70x = 639,737,999.55 × 196,909,487.70
  4. Step 4: Simplify right side
    426,491,999.70x = 125,970,481,753,613,312
  5. Step 5: Solve for x
    x = 125,970,481,753,613,312/426,491,999.70
  6. Step 6: Final answer
    x = 295,364,231.55

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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.