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Finding the Fourth Proportional to 4,751.28, 7,120.42 and 2,672.28

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Solution

The fourth proportional to 4,751.28, 7,120.42 and 2,672.28 is: 4,004.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,751.28 : 7,120.42 = 2,672.28 : x
  2. Step 2: Convert to fraction form
    4,751.28/7,120.42 = 2,672.28/x
  3. Step 3: Cross multiply
    4,751.28x = 7,120.42 × 2,672.28
  4. Step 4: Simplify right side
    4,751.28x = 19,027,755.96
  5. Step 5: Solve for x
    x = 19,027,755.96/4,751.28
  6. Step 6: Final answer
    x = 4,004.76

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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.