Home / 872,890,971.71-1,309,508,942.20-320,198,531.85

Finding the Fourth Proportional to 872,890,971.71, 1,309,508,942.20 and 320,198,531.85

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Solution

The fourth proportional to 872,890,971.71, 1,309,508,942.20 and 320,198,531.85 is: 480,361,069.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    872,890,971.71 : 1,309,508,942.20 = 320,198,531.85 : x
  2. Step 2: Convert to fraction form
    872,890,971.71/1,309,508,942.20 = 320,198,531.85/x
  3. Step 3: Cross multiply
    872,890,971.71x = 1,309,508,942.20 × 320,198,531.85
  4. Step 4: Simplify right side
    872,890,971.71x = 419,302,840,736,086,016
  5. Step 5: Solve for x
    x = 419,302,840,736,086,016/872,890,971.71
  6. Step 6: Final answer
    x = 480,361,069.51

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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.