Home / 1,187,028.33-1,638,099.73-643,164.56

Finding the Fourth Proportional to 1,187,028.33, 1,638,099.73 and 643,164.56

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Solution

The fourth proportional to 1,187,028.33, 1,638,099.73 and 643,164.56 is: 887,567.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,187,028.33 : 1,638,099.73 = 643,164.56 : x
  2. Step 2: Convert to fraction form
    1,187,028.33/1,638,099.73 = 643,164.56/x
  3. Step 3: Cross multiply
    1,187,028.33x = 1,638,099.73 × 643,164.56
  4. Step 4: Simplify right side
    1,187,028.33x = 1,053,567,683,891.07
  5. Step 5: Solve for x
    x = 1,053,567,683,891.07/1,187,028.33
  6. Step 6: Final answer
    x = 887,567.43

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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.