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Finding the Fourth Proportional to 2,720.86, 4,080.48 and 871.66

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Solution

The fourth proportional to 2,720.86, 4,080.48 and 871.66 is: 1,307.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,720.86 : 4,080.48 = 871.66 : x
  2. Step 2: Convert to fraction form
    2,720.86/4,080.48 = 871.66/x
  3. Step 3: Cross multiply
    2,720.86x = 4,080.48 × 871.66
  4. Step 4: Simplify right side
    2,720.86x = 3,556,791.20
  5. Step 5: Solve for x
    x = 3,556,791.20/2,720.86
  6. Step 6: Final answer
    x = 1,307.23

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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.