Home / 1,187,978.36-1,639,421.84-644,112.77

Finding the Fourth Proportional to 1,187,978.36, 1,639,421.84 and 644,112.77

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Solution

The fourth proportional to 1,187,978.36, 1,639,421.84 and 644,112.77 is: 888,881.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,187,978.36 : 1,639,421.84 = 644,112.77 : x
  2. Step 2: Convert to fraction form
    1,187,978.36/1,639,421.84 = 644,112.77/x
  3. Step 3: Cross multiply
    1,187,978.36x = 1,639,421.84 × 644,112.77
  4. Step 4: Simplify right side
    1,187,978.36x = 1,055,972,535,974.07
  5. Step 5: Solve for x
    x = 1,055,972,535,974.07/1,187,978.36
  6. Step 6: Final answer
    x = 888,881.97

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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.