Home / 1,187,917.95-1,640,679.91-805,280.43

Finding the Fourth Proportional to 1,187,917.95, 1,640,679.91 and 805,280.43

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Solution

The fourth proportional to 1,187,917.95, 1,640,679.91 and 805,280.43 is: 1,112,204.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,187,917.95 : 1,640,679.91 = 805,280.43 : x
  2. Step 2: Convert to fraction form
    1,187,917.95/1,640,679.91 = 805,280.43/x
  3. Step 3: Cross multiply
    1,187,917.95x = 1,640,679.91 × 805,280.43
  4. Step 4: Simplify right side
    1,187,917.95x = 1,321,207,427,556.51
  5. Step 5: Solve for x
    x = 1,321,207,427,556.51/1,187,917.95
  6. Step 6: Final answer
    x = 1,112,204.28

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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.