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Finding the Fourth Proportional to 2,792.80, 3,854 and 1,550.80

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Solution

The fourth proportional to 2,792.80, 3,854 and 1,550.80 is: 2,140.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,792.80 : 3,854 = 1,550.80 : x
  2. Step 2: Convert to fraction form
    2,792.80/3,854 = 1,550.80/x
  3. Step 3: Cross multiply
    2,792.80x = 3,854 × 1,550.80
  4. Step 4: Simplify right side
    2,792.80x = 5,976,783.20
  5. Step 5: Solve for x
    x = 5,976,783.20/2,792.80
  6. Step 6: Final answer
    x = 2,140.07

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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.