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Finding the Fourth Proportional to 3,867.92, 5,769.40 and 3,518

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Solution

The fourth proportional to 3,867.92, 5,769.40 and 3,518 is: 5,247.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,867.92 : 5,769.40 = 3,518 : x
  2. Step 2: Convert to fraction form
    3,867.92/5,769.40 = 3,518/x
  3. Step 3: Cross multiply
    3,867.92x = 5,769.40 × 3,518
  4. Step 4: Simplify right side
    3,867.92x = 20,296,749.20
  5. Step 5: Solve for x
    x = 20,296,749.20/3,867.92
  6. Step 6: Final answer
    x = 5,247.46

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.