Home / 311,809,910.62-429,854,082.78-212,563,296.58

Finding the Fourth Proportional to 311,809,910.62, 429,854,082.78 and 212,563,296.58

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Solution

The fourth proportional to 311,809,910.62, 429,854,082.78 and 212,563,296.58 is: 293,034,947.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    311,809,910.62 : 429,854,082.78 = 212,563,296.58 : x
  2. Step 2: Convert to fraction form
    311,809,910.62/429,854,082.78 = 212,563,296.58/x
  3. Step 3: Cross multiply
    311,809,910.62x = 429,854,082.78 × 212,563,296.58
  4. Step 4: Simplify right side
    311,809,910.62x = 91,371,200,884,089,008
  5. Step 5: Solve for x
    x = 91,371,200,884,089,008/311,809,910.62
  6. Step 6: Final answer
    x = 293,034,947.81

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.