Home / 1,245,284.70-1,867,927.05-820,131.90

Finding the Fourth Proportional to 1,245,284.70, 1,867,927.05 and 820,131.90

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Solution

The fourth proportional to 1,245,284.70, 1,867,927.05 and 820,131.90 is: 1,230,197.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,245,284.70 : 1,867,927.05 = 820,131.90 : x
  2. Step 2: Convert to fraction form
    1,245,284.70/1,867,927.05 = 820,131.90/x
  3. Step 3: Cross multiply
    1,245,284.70x = 1,867,927.05 × 820,131.90
  4. Step 4: Simplify right side
    1,245,284.70x = 1,531,946,560,577.90
  5. Step 5: Solve for x
    x = 1,531,946,560,577.90/1,245,284.70
  6. Step 6: Final answer
    x = 1,230,197.85

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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.