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Finding the Fourth Proportional to 1,613, 2,226.12 and 905.03

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Solution

The fourth proportional to 1,613, 2,226.12 and 905.03 is: 1,249.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,613 : 2,226.12 = 905.03 : x
  2. Step 2: Convert to fraction form
    1,613/2,226.12 = 905.03/x
  3. Step 3: Cross multiply
    1,613x = 2,226.12 × 905.03
  4. Step 4: Simplify right side
    1,613x = 2,014,705.38
  5. Step 5: Solve for x
    x = 2,014,705.38/1,613
  6. Step 6: Final answer
    x = 1,249.04

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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.