Home / 2,777.82-3,831.26-1,938.26

Finding the Fourth Proportional to 2,777.82, 3,831.26 and 1,938.26

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Solution

The fourth proportional to 2,777.82, 3,831.26 and 1,938.26 is: 2,673.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,777.82 : 3,831.26 = 1,938.26 : x
  2. Step 2: Convert to fraction form
    2,777.82/3,831.26 = 1,938.26/x
  3. Step 3: Cross multiply
    2,777.82x = 3,831.26 × 1,938.26
  4. Step 4: Simplify right side
    2,777.82x = 7,425,949.16
  5. Step 5: Solve for x
    x = 7,425,949.16/2,777.82
  6. Step 6: Final answer
    x = 2,673.30

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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.