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Finding the Fourth Proportional to 2,655.81, 3,981.80 and 1,249.44

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Solution

The fourth proportional to 2,655.81, 3,981.80 and 1,249.44 is: 1,873.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,655.81 : 3,981.80 = 1,249.44 : x
  2. Step 2: Convert to fraction form
    2,655.81/3,981.80 = 1,249.44/x
  3. Step 3: Cross multiply
    2,655.81x = 3,981.80 × 1,249.44
  4. Step 4: Simplify right side
    2,655.81x = 4,975,020.19
  5. Step 5: Solve for x
    x = 4,975,020.19/2,655.81
  6. Step 6: Final answer
    x = 1,873.26

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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.