Home / 1,387,943.80-2,078,805.30-1,139,111.80

Finding the Fourth Proportional to 1,387,943.80, 2,078,805.30 and 1,139,111.80

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Solution

The fourth proportional to 1,387,943.80, 2,078,805.30 and 1,139,111.80 is: 1,706,114.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,387,943.80 : 2,078,805.30 = 1,139,111.80 : x
  2. Step 2: Convert to fraction form
    1,387,943.80/2,078,805.30 = 1,139,111.80/x
  3. Step 3: Cross multiply
    1,387,943.80x = 2,078,805.30 × 1,139,111.80
  4. Step 4: Simplify right side
    1,387,943.80x = 2,367,991,647,132.54
  5. Step 5: Solve for x
    x = 2,367,991,647,132.54/1,387,943.80
  6. Step 6: Final answer
    x = 1,706,114.94

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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.