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Finding the Fourth Proportional to 2,719.88, 4,079.97 and 772.03

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Solution

The fourth proportional to 2,719.88, 4,079.97 and 772.03 is: 1,158.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,719.88 : 4,079.97 = 772.03 : x
  2. Step 2: Convert to fraction form
    2,719.88/4,079.97 = 772.03/x
  3. Step 3: Cross multiply
    2,719.88x = 4,079.97 × 772.03
  4. Step 4: Simplify right side
    2,719.88x = 3,149,864.34
  5. Step 5: Solve for x
    x = 3,149,864.34/2,719.88
  6. Step 6: Final answer
    x = 1,158.09

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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.