Home / 1,269.91-1,749.84-1,187.11

Finding the Fourth Proportional to 1,269.91, 1,749.84 and 1,187.11

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Solution

The fourth proportional to 1,269.91, 1,749.84 and 1,187.11 is: 1,635.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,269.91 : 1,749.84 = 1,187.11 : x
  2. Step 2: Convert to fraction form
    1,269.91/1,749.84 = 1,187.11/x
  3. Step 3: Cross multiply
    1,269.91x = 1,749.84 × 1,187.11
  4. Step 4: Simplify right side
    1,269.91x = 2,077,252.56
  5. Step 5: Solve for x
    x = 2,077,252.56/1,269.91
  6. Step 6: Final answer
    x = 1,635.75

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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.