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Finding the Fourth Proportional to 2,751.57, 4,128.30 and 1,108.62

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Solution

The fourth proportional to 2,751.57, 4,128.30 and 1,108.62 is: 1,663.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,751.57 : 4,128.30 = 1,108.62 : x
  2. Step 2: Convert to fraction form
    2,751.57/4,128.30 = 1,108.62/x
  3. Step 3: Cross multiply
    2,751.57x = 4,128.30 × 1,108.62
  4. Step 4: Simplify right side
    2,751.57x = 4,576,715.95
  5. Step 5: Solve for x
    x = 4,576,715.95/2,751.57
  6. Step 6: Final answer
    x = 1,663.31

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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.