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Finding the Fourth Proportional to 1,245.62, 1,867.41 and 936.87

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Solution

The fourth proportional to 1,245.62, 1,867.41 and 936.87 is: 1,404.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,245.62 : 1,867.41 = 936.87 : x
  2. Step 2: Convert to fraction form
    1,245.62/1,867.41 = 936.87/x
  3. Step 3: Cross multiply
    1,245.62x = 1,867.41 × 936.87
  4. Step 4: Simplify right side
    1,245.62x = 1,749,520.41
  5. Step 5: Solve for x
    x = 1,749,520.41/1,245.62
  6. Step 6: Final answer
    x = 1,404.54

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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.