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Finding the Fourth Proportional to 2,920.25, 4,028.91 and 1,724.98

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Solution

The fourth proportional to 2,920.25, 4,028.91 and 1,724.98 is: 2,379.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,920.25 : 4,028.91 = 1,724.98 : x
  2. Step 2: Convert to fraction form
    2,920.25/4,028.91 = 1,724.98/x
  3. Step 3: Cross multiply
    2,920.25x = 4,028.91 × 1,724.98
  4. Step 4: Simplify right side
    2,920.25x = 6,949,799.90
  5. Step 5: Solve for x
    x = 6,949,799.90/2,920.25
  6. Step 6: Final answer
    x = 2,379.86

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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.