Home / 989,121.78-1,481,375.39-722,220.30

Finding the Fourth Proportional to 989,121.78, 1,481,375.39 and 722,220.30

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Solution

The fourth proportional to 989,121.78, 1,481,375.39 and 722,220.30 is: 1,081,645.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    989,121.78 : 1,481,375.39 = 722,220.30 : x
  2. Step 2: Convert to fraction form
    989,121.78/1,481,375.39 = 722,220.30/x
  3. Step 3: Cross multiply
    989,121.78x = 1,481,375.39 × 722,220.30
  4. Step 4: Simplify right side
    989,121.78x = 1,069,879,374,967.32
  5. Step 5: Solve for x
    x = 1,069,879,374,967.32/989,121.78
  6. Step 6: Final answer
    x = 1,081,645.76

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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.