Home / 1,187,029.33-1,638,101.11-643,165.56

Finding the Fourth Proportional to 1,187,029.33, 1,638,101.11 and 643,165.56

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Solution

The fourth proportional to 1,187,029.33, 1,638,101.11 and 643,165.56 is: 887,568.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,187,029.33 : 1,638,101.11 = 643,165.56 : x
  2. Step 2: Convert to fraction form
    1,187,029.33/1,638,101.11 = 643,165.56/x
  3. Step 3: Cross multiply
    1,187,029.33x = 1,638,101.11 × 643,165.56
  4. Step 4: Simplify right side
    1,187,029.33x = 1,053,570,209,559.27
  5. Step 5: Solve for x
    x = 1,053,570,209,559.27/1,187,029.33
  6. Step 6: Final answer
    x = 887,568.81

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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.