Home / 1,987,471.77-2,981,208.67-639,634.20

Finding the Fourth Proportional to 1,987,471.77, 2,981,208.67 and 639,634.20

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Solution

The fourth proportional to 1,987,471.77, 2,981,208.67 and 639,634.20 is: 959,451.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,987,471.77 : 2,981,208.67 = 639,634.20 : x
  2. Step 2: Convert to fraction form
    1,987,471.77/2,981,208.67 = 639,634.20/x
  3. Step 3: Cross multiply
    1,987,471.77x = 2,981,208.67 × 639,634.20
  4. Step 4: Simplify right side
    1,987,471.77x = 1,906,883,021,069.43
  5. Step 5: Solve for x
    x = 1,906,883,021,069.43/1,987,471.77
  6. Step 6: Final answer
    x = 959,451.63

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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.