Home / 1,187,075.97-1,638,166.28-643,211.33

Finding the Fourth Proportional to 1,187,075.97, 1,638,166.28 and 643,211.33

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Solution

The fourth proportional to 1,187,075.97, 1,638,166.28 and 643,211.33 is: 887,632.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,187,075.97 : 1,638,166.28 = 643,211.33 : x
  2. Step 2: Convert to fraction form
    1,187,075.97/1,638,166.28 = 643,211.33/x
  3. Step 3: Cross multiply
    1,187,075.97x = 1,638,166.28 × 643,211.33
  4. Step 4: Simplify right side
    1,187,075.97x = 1,053,687,115,815.37
  5. Step 5: Solve for x
    x = 1,053,687,115,815.37/1,187,075.97
  6. Step 6: Final answer
    x = 887,632.42

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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.