Home / 1,395.24-1,921.26-1,185.72

Finding the Fourth Proportional to 1,395.24, 1,921.26 and 1,185.72

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Solution

The fourth proportional to 1,395.24, 1,921.26 and 1,185.72 is: 1,632.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,395.24 : 1,921.26 = 1,185.72 : x
  2. Step 2: Convert to fraction form
    1,395.24/1,921.26 = 1,185.72/x
  3. Step 3: Cross multiply
    1,395.24x = 1,921.26 × 1,185.72
  4. Step 4: Simplify right side
    1,395.24x = 2,278,076.41
  5. Step 5: Solve for x
    x = 2,278,076.41/1,395.24
  6. Step 6: Final answer
    x = 1,632.75

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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.