Home / 571,921,308.72-789,188,249.77-320,968,139.85

Finding the Fourth Proportional to 571,921,308.72, 789,188,249.77 and 320,968,139.85

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Solution

The fourth proportional to 571,921,308.72, 789,188,249.77 and 320,968,139.85 is: 442,900,589.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    571,921,308.72 : 789,188,249.77 = 320,968,139.85 : x
  2. Step 2: Convert to fraction form
    571,921,308.72/789,188,249.77 = 320,968,139.85/x
  3. Step 3: Cross multiply
    571,921,308.72x = 789,188,249.77 × 320,968,139.85
  4. Step 4: Simplify right side
    571,921,308.72x = 253,304,284,520,154,112
  5. Step 5: Solve for x
    x = 253,304,284,520,154,112/571,921,308.72
  6. Step 6: Final answer
    x = 442,900,589.05

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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.