Home / 1,311,863.75-1,809,753.44-767,665.70

Finding the Fourth Proportional to 1,311,863.75, 1,809,753.44 and 767,665.70

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Solution

The fourth proportional to 1,311,863.75, 1,809,753.44 and 767,665.70 is: 1,059,016.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,311,863.75 : 1,809,753.44 = 767,665.70 : x
  2. Step 2: Convert to fraction form
    1,311,863.75/1,809,753.44 = 767,665.70/x
  3. Step 3: Cross multiply
    1,311,863.75x = 1,809,753.44 × 767,665.70
  4. Step 4: Simplify right side
    1,311,863.75x = 1,389,285,645,424.35
  5. Step 5: Solve for x
    x = 1,389,285,645,424.35/1,311,863.75
  6. Step 6: Final answer
    x = 1,059,016.72

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.