Home / 1,187,621.05-1,640,279.07-781,535.78

Finding the Fourth Proportional to 1,187,621.05, 1,640,279.07 and 781,535.78

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Solution

The fourth proportional to 1,187,621.05, 1,640,279.07 and 781,535.78 is: 1,079,415.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,187,621.05 : 1,640,279.07 = 781,535.78 : x
  2. Step 2: Convert to fraction form
    1,187,621.05/1,640,279.07 = 781,535.78/x
  3. Step 3: Cross multiply
    1,187,621.05x = 1,640,279.07 × 781,535.78
  4. Step 4: Simplify right side
    1,187,621.05x = 1,281,936,782,390.12
  5. Step 5: Solve for x
    x = 1,281,936,782,390.12/1,187,621.05
  6. Step 6: Final answer
    x = 1,079,415.68

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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.