Home / 1,613.11-2,226.27-905.15

Finding the Fourth Proportional to 1,613.11, 2,226.27 and 905.15

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Solution

The fourth proportional to 1,613.11, 2,226.27 and 905.15 is: 1,249.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,613.11 : 2,226.27 = 905.15 : x
  2. Step 2: Convert to fraction form
    1,613.11/2,226.27 = 905.15/x
  3. Step 3: Cross multiply
    1,613.11x = 2,226.27 × 905.15
  4. Step 4: Simplify right side
    1,613.11x = 2,015,101.26
  5. Step 5: Solve for x
    x = 2,015,101.26/1,613.11
  6. Step 6: Final answer
    x = 1,249.20

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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.