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Finding the Fourth Proportional to 3,987.74, 5,502.72 and 2,309.26

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Solution

The fourth proportional to 3,987.74, 5,502.72 and 2,309.26 is: 3,186.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,987.74 : 5,502.72 = 2,309.26 : x
  2. Step 2: Convert to fraction form
    3,987.74/5,502.72 = 2,309.26/x
  3. Step 3: Cross multiply
    3,987.74x = 5,502.72 × 2,309.26
  4. Step 4: Simplify right side
    3,987.74x = 12,707,172.13
  5. Step 5: Solve for x
    x = 12,707,172.13/3,987.74
  6. Step 6: Final answer
    x = 3,186.56

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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.