Home / 1,187,424.36-1,638,665.52-643,577.64

Finding the Fourth Proportional to 1,187,424.36, 1,638,665.52 and 643,577.64

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Solution

The fourth proportional to 1,187,424.36, 1,638,665.52 and 643,577.64 is: 888,147.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,187,424.36 : 1,638,665.52 = 643,577.64 : x
  2. Step 2: Convert to fraction form
    1,187,424.36/1,638,665.52 = 643,577.64/x
  3. Step 3: Cross multiply
    1,187,424.36x = 1,638,665.52 × 643,577.64
  4. Step 4: Simplify right side
    1,187,424.36x = 1,054,608,488,110.97
  5. Step 5: Solve for x
    x = 1,054,608,488,110.97/1,187,424.36
  6. Step 6: Final answer
    x = 888,147.93

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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.