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Finding the Fourth Proportional to 3,981,489.19, 5,972,255.65 and 989,673.19

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Solution

The fourth proportional to 3,981,489.19, 5,972,255.65 and 989,673.19 is: 1,484,515.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,981,489.19 : 5,972,255.65 = 989,673.19 : x
  2. Step 2: Convert to fraction form
    3,981,489.19/5,972,255.65 = 989,673.19/x
  3. Step 3: Cross multiply
    3,981,489.19x = 5,972,255.65 × 989,673.19
  4. Step 4: Simplify right side
    3,981,489.19x = 5,910,581,286,937.48
  5. Step 5: Solve for x
    x = 5,910,581,286,937.48/3,981,489.19
  6. Step 6: Final answer
    x = 1,484,515.22

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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.