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Finding the Fourth Proportional to 5,540.28, 7,650.90 and 4,749.72

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Solution

The fourth proportional to 5,540.28, 7,650.90 and 4,749.72 is: 6,559.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,540.28 : 7,650.90 = 4,749.72 : x
  2. Step 2: Convert to fraction form
    5,540.28/7,650.90 = 4,749.72/x
  3. Step 3: Cross multiply
    5,540.28x = 7,650.90 × 4,749.72
  4. Step 4: Simplify right side
    5,540.28x = 36,339,632.75
  5. Step 5: Solve for x
    x = 36,339,632.75/5,540.28
  6. Step 6: Final answer
    x = 6,559.17

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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.