Home / 1,222,642.29-1,687,162.44-678,735.72

Finding the Fourth Proportional to 1,222,642.29, 1,687,162.44 and 678,735.72

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Solution

The fourth proportional to 1,222,642.29, 1,687,162.44 and 678,735.72 is: 936,608.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,222,642.29 : 1,687,162.44 = 678,735.72 : x
  2. Step 2: Convert to fraction form
    1,222,642.29/1,687,162.44 = 678,735.72/x
  3. Step 3: Cross multiply
    1,222,642.29x = 1,687,162.44 × 678,735.72
  4. Step 4: Simplify right side
    1,222,642.29x = 1,145,137,413,470.36
  5. Step 5: Solve for x
    x = 1,145,137,413,470.36/1,222,642.29
  6. Step 6: Final answer
    x = 936,608.71

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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.