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Finding the Fourth Proportional to 1,267.11, 1,748.13 and 936.33

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Solution

The fourth proportional to 1,267.11, 1,748.13 and 936.33 is: 1,291.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,267.11 : 1,748.13 = 936.33 : x
  2. Step 2: Convert to fraction form
    1,267.11/1,748.13 = 936.33/x
  3. Step 3: Cross multiply
    1,267.11x = 1,748.13 × 936.33
  4. Step 4: Simplify right side
    1,267.11x = 1,636,826.56
  5. Step 5: Solve for x
    x = 1,636,826.56/1,267.11
  6. Step 6: Final answer
    x = 1,291.78

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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.