Home / 1,361.79-1,867.20-1,328.97

Finding the Fourth Proportional to 1,361.79, 1,867.20 and 1,328.97

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Solution

The fourth proportional to 1,361.79, 1,867.20 and 1,328.97 is: 1,822.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,361.79 : 1,867.20 = 1,328.97 : x
  2. Step 2: Convert to fraction form
    1,361.79/1,867.20 = 1,328.97/x
  3. Step 3: Cross multiply
    1,361.79x = 1,867.20 × 1,328.97
  4. Step 4: Simplify right side
    1,361.79x = 2,481,452.78
  5. Step 5: Solve for x
    x = 2,481,452.78/1,361.79
  6. Step 6: Final answer
    x = 1,822.20

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.