Home / 1,320,140.78-1,821,731.26-810,744.74

Finding the Fourth Proportional to 1,320,140.78, 1,821,731.26 and 810,744.74

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Solution

The fourth proportional to 1,320,140.78, 1,821,731.26 and 810,744.74 is: 1,118,789.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,320,140.78 : 1,821,731.26 = 810,744.74 : x
  2. Step 2: Convert to fraction form
    1,320,140.78/1,821,731.26 = 810,744.74/x
  3. Step 3: Cross multiply
    1,320,140.78x = 1,821,731.26 × 810,744.74
  4. Step 4: Simplify right side
    1,320,140.78x = 1,476,959,036,738.57
  5. Step 5: Solve for x
    x = 1,476,959,036,738.57/1,320,140.78
  6. Step 6: Final answer
    x = 1,118,789.04

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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.