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Finding the Fourth Proportional to 2,751.71, 4,128.17 and 877.57

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Solution

The fourth proportional to 2,751.71, 4,128.17 and 877.57 is: 1,316.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,751.71 : 4,128.17 = 877.57 : x
  2. Step 2: Convert to fraction form
    2,751.71/4,128.17 = 877.57/x
  3. Step 3: Cross multiply
    2,751.71x = 4,128.17 × 877.57
  4. Step 4: Simplify right side
    2,751.71x = 3,622,743.44
  5. Step 5: Solve for x
    x = 3,622,743.44/2,751.71
  6. Step 6: Final answer
    x = 1,316.54

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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.