Home / 1,613.31-2,226.27-905.25

Finding the Fourth Proportional to 1,613.31, 2,226.27 and 905.25

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Solution

The fourth proportional to 1,613.31, 2,226.27 and 905.25 is: 1,249.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,613.31 : 2,226.27 = 905.25 : x
  2. Step 2: Convert to fraction form
    1,613.31/2,226.27 = 905.25/x
  3. Step 3: Cross multiply
    1,613.31x = 2,226.27 × 905.25
  4. Step 4: Simplify right side
    1,613.31x = 2,015,330.92
  5. Step 5: Solve for x
    x = 2,015,330.92/1,613.31
  6. Step 6: Final answer
    x = 1,249.19

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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.