Home / 1,215,003.80-1,822,505.70-860,418.20

Finding the Fourth Proportional to 1,215,003.80, 1,822,505.70 and 860,418.20

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Solution

The fourth proportional to 1,215,003.80, 1,822,505.70 and 860,418.20 is: 1,290,627.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,215,003.80 : 1,822,505.70 = 860,418.20 : x
  2. Step 2: Convert to fraction form
    1,215,003.80/1,822,505.70 = 860,418.20/x
  3. Step 3: Cross multiply
    1,215,003.80x = 1,822,505.70 × 860,418.20
  4. Step 4: Simplify right side
    1,215,003.80x = 1,568,117,073,883.74
  5. Step 5: Solve for x
    x = 1,568,117,073,883.74/1,215,003.80
  6. Step 6: Final answer
    x = 1,290,627.30

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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.