Home / 1,489.10-2,233.96-749.12

Finding the Fourth Proportional to 1,489.10, 2,233.96 and 749.12

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Solution

The fourth proportional to 1,489.10, 2,233.96 and 749.12 is: 1,123.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,489.10 : 2,233.96 = 749.12 : x
  2. Step 2: Convert to fraction form
    1,489.10/2,233.96 = 749.12/x
  3. Step 3: Cross multiply
    1,489.10x = 2,233.96 × 749.12
  4. Step 4: Simplify right side
    1,489.10x = 1,673,504.12
  5. Step 5: Solve for x
    x = 1,673,504.12/1,489.10
  6. Step 6: Final answer
    x = 1,123.84

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.