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Finding the Fourth Proportional to 2,055.36, 3,081 and 756.48

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Solution

The fourth proportional to 2,055.36, 3,081 and 756.48 is: 1,133.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,055.36 : 3,081 = 756.48 : x
  2. Step 2: Convert to fraction form
    2,055.36/3,081 = 756.48/x
  3. Step 3: Cross multiply
    2,055.36x = 3,081 × 756.48
  4. Step 4: Simplify right side
    2,055.36x = 2,330,714.88
  5. Step 5: Solve for x
    x = 2,330,714.88/2,055.36
  6. Step 6: Final answer
    x = 1,133.97

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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.