Home / 1,231,619.31-1,699,642.89-687,761.55

Finding the Fourth Proportional to 1,231,619.31, 1,699,642.89 and 687,761.55

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Solution

The fourth proportional to 1,231,619.31, 1,699,642.89 and 687,761.55 is: 949,115.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,231,619.31 : 1,699,642.89 = 687,761.55 : x
  2. Step 2: Convert to fraction form
    1,231,619.31/1,699,642.89 = 687,761.55/x
  3. Step 3: Cross multiply
    1,231,619.31x = 1,699,642.89 × 687,761.55
  4. Step 4: Simplify right side
    1,231,619.31x = 1,168,949,028,472.88
  5. Step 5: Solve for x
    x = 1,168,949,028,472.88/1,231,619.31
  6. Step 6: Final answer
    x = 949,115.54

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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.