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Finding the Fourth Proportional to 2,855.28, 4,274.28 and 2,639.28

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Solution

The fourth proportional to 2,855.28, 4,274.28 and 2,639.28 is: 3,950.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,855.28 : 4,274.28 = 2,639.28 : x
  2. Step 2: Convert to fraction form
    2,855.28/4,274.28 = 2,639.28/x
  3. Step 3: Cross multiply
    2,855.28x = 4,274.28 × 2,639.28
  4. Step 4: Simplify right side
    2,855.28x = 11,281,021.72
  5. Step 5: Solve for x
    x = 11,281,021.72/2,855.28
  6. Step 6: Final answer
    x = 3,950.93

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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.