Home / 1,179,138.36-1,769,081.40-420,963.60

Finding the Fourth Proportional to 1,179,138.36, 1,769,081.40 and 420,963.60

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Solution

The fourth proportional to 1,179,138.36, 1,769,081.40 and 420,963.60 is: 631,578.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,179,138.36 : 1,769,081.40 = 420,963.60 : x
  2. Step 2: Convert to fraction form
    1,179,138.36/1,769,081.40 = 420,963.60/x
  3. Step 3: Cross multiply
    1,179,138.36x = 1,769,081.40 × 420,963.60
  4. Step 4: Simplify right side
    1,179,138.36x = 744,718,874,837.04
  5. Step 5: Solve for x
    x = 744,718,874,837.04/1,179,138.36
  6. Step 6: Final answer
    x = 631,578.87

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.