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Finding the Fourth Proportional to 2,763.90, 3,805.92 and 1,976.58

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Solution

The fourth proportional to 2,763.90, 3,805.92 and 1,976.58 is: 2,721.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,763.90 : 3,805.92 = 1,976.58 : x
  2. Step 2: Convert to fraction form
    2,763.90/3,805.92 = 1,976.58/x
  3. Step 3: Cross multiply
    2,763.90x = 3,805.92 × 1,976.58
  4. Step 4: Simplify right side
    2,763.90x = 7,522,705.35
  5. Step 5: Solve for x
    x = 7,522,705.35/2,763.90
  6. Step 6: Final answer
    x = 2,721.77

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1.5x scale

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.