Home / 1,187,928.92-1,640,695.06-805,291.40

Finding the Fourth Proportional to 1,187,928.92, 1,640,695.06 and 805,291.40

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Solution

The fourth proportional to 1,187,928.92, 1,640,695.06 and 805,291.40 is: 1,112,219.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,187,928.92 : 1,640,695.06 = 805,291.40 : x
  2. Step 2: Convert to fraction form
    1,187,928.92/1,640,695.06 = 805,291.40/x
  3. Step 3: Cross multiply
    1,187,928.92x = 1,640,695.06 × 805,291.40
  4. Step 4: Simplify right side
    1,187,928.92x = 1,321,237,626,948.84
  5. Step 5: Solve for x
    x = 1,321,237,626,948.84/1,187,928.92
  6. Step 6: Final answer
    x = 1,112,219.43

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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.