Home / 1,187,592.32-1,638,833.49-643,716.43

Finding the Fourth Proportional to 1,187,592.32, 1,638,833.49 and 643,716.43

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Solution

The fourth proportional to 1,187,592.32, 1,638,833.49 and 643,716.43 is: 888,304.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,187,592.32 : 1,638,833.49 = 643,716.43 : x
  2. Step 2: Convert to fraction form
    1,187,592.32/1,638,833.49 = 643,716.43/x
  3. Step 3: Cross multiply
    1,187,592.32x = 1,638,833.49 × 643,716.43
  4. Step 4: Simplify right side
    1,187,592.32x = 1,054,944,042,522.97
  5. Step 5: Solve for x
    x = 1,054,944,042,522.97/1,187,592.32
  6. Step 6: Final answer
    x = 888,304.87

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.