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Finding the Fourth Proportional to 3,981,410.92, 5,972,121.06 and 989,594.92

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Solution

The fourth proportional to 3,981,410.92, 5,972,121.06 and 989,594.92 is: 1,484,393.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,981,410.92 : 5,972,121.06 = 989,594.92 : x
  2. Step 2: Convert to fraction form
    3,981,410.92/5,972,121.06 = 989,594.92/x
  3. Step 3: Cross multiply
    3,981,410.92x = 5,972,121.06 × 989,594.92
  4. Step 4: Simplify right side
    3,981,410.92x = 5,909,980,662,601.02
  5. Step 5: Solve for x
    x = 5,909,980,662,601.02/3,981,410.92
  6. Step 6: Final answer
    x = 1,484,393.54

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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.