Home / 1,187,029.82-1,638,101.80-643,166.06

Finding the Fourth Proportional to 1,187,029.82, 1,638,101.80 and 643,166.06

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Solution

The fourth proportional to 1,187,029.82, 1,638,101.80 and 643,166.06 is: 887,569.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,187,029.82 : 1,638,101.80 = 643,166.06 : x
  2. Step 2: Convert to fraction form
    1,187,029.82/1,638,101.80 = 643,166.06/x
  3. Step 3: Cross multiply
    1,187,029.82x = 1,638,101.80 × 643,166.06
  4. Step 4: Simplify right side
    1,187,029.82x = 1,053,571,480,584.91
  5. Step 5: Solve for x
    x = 1,053,571,480,584.91/1,187,029.82
  6. Step 6: Final answer
    x = 887,569.51

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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.