Home / 1,724.44-2,379.76-978.38

Finding the Fourth Proportional to 1,724.44, 2,379.76 and 978.38

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Solution

The fourth proportional to 1,724.44, 2,379.76 and 978.38 is: 1,350.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,724.44 : 2,379.76 = 978.38 : x
  2. Step 2: Convert to fraction form
    1,724.44/2,379.76 = 978.38/x
  3. Step 3: Cross multiply
    1,724.44x = 2,379.76 × 978.38
  4. Step 4: Simplify right side
    1,724.44x = 2,328,309.59
  5. Step 5: Solve for x
    x = 2,328,309.59/1,724.44
  6. Step 6: Final answer
    x = 1,350.18

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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.