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Finding the Fourth Proportional to 5,291.28, 7,935.12 and 2,519.28

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Solution

The fourth proportional to 5,291.28, 7,935.12 and 2,519.28 is: 3,778.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,291.28 : 7,935.12 = 2,519.28 : x
  2. Step 2: Convert to fraction form
    5,291.28/7,935.12 = 2,519.28/x
  3. Step 3: Cross multiply
    5,291.28x = 7,935.12 × 2,519.28
  4. Step 4: Simplify right side
    5,291.28x = 19,990,789.11
  5. Step 5: Solve for x
    x = 19,990,789.11/5,291.28
  6. Step 6: Final answer
    x = 3,778.06

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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.