Home / 1,441.20-1,991.64-1,091.28

Finding the Fourth Proportional to 1,441.20, 1,991.64 and 1,091.28

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Solution

The fourth proportional to 1,441.20, 1,991.64 and 1,091.28 is: 1,508.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,441.20 : 1,991.64 = 1,091.28 : x
  2. Step 2: Convert to fraction form
    1,441.20/1,991.64 = 1,091.28/x
  3. Step 3: Cross multiply
    1,441.20x = 1,991.64 × 1,091.28
  4. Step 4: Simplify right side
    1,441.20x = 2,173,436.90
  5. Step 5: Solve for x
    x = 2,173,436.90/1,441.20
  6. Step 6: Final answer
    x = 1,508.07

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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.