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Finding the Fourth Proportional to 3,981,742.41, 5,972,634.98 and 989,926.41

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Solution

The fourth proportional to 3,981,742.41, 5,972,634.98 and 989,926.41 is: 1,484,894.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,981,742.41 : 5,972,634.98 = 989,926.41 : x
  2. Step 2: Convert to fraction form
    3,981,742.41/5,972,634.98 = 989,926.41/x
  3. Step 3: Cross multiply
    3,981,742.41x = 5,972,634.98 × 989,926.41
  4. Step 4: Simplify right side
    3,981,742.41x = 5,912,469,099,042.19
  5. Step 5: Solve for x
    x = 5,912,469,099,042.19/3,981,742.41
  6. Step 6: Final answer
    x = 1,484,894.93

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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.