Home / 2,738.25-3,778.79-1,690.34

Finding the Fourth Proportional to 2,738.25, 3,778.79 and 1,690.34

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Solution

The fourth proportional to 2,738.25, 3,778.79 and 1,690.34 is: 2,332.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,738.25 : 3,778.79 = 1,690.34 : x
  2. Step 2: Convert to fraction form
    2,738.25/3,778.79 = 1,690.34/x
  3. Step 3: Cross multiply
    2,738.25x = 3,778.79 × 1,690.34
  4. Step 4: Simplify right side
    2,738.25x = 6,387,412.54
  5. Step 5: Solve for x
    x = 6,387,412.54/2,738.25
  6. Step 6: Final answer
    x = 2,332.66

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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.