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Finding the Fourth Proportional to 5,274.72, 7,917.84 and 3,087.72

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Solution

The fourth proportional to 5,274.72, 7,917.84 and 3,087.72 is: 4,634.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,274.72 : 7,917.84 = 3,087.72 : x
  2. Step 2: Convert to fraction form
    5,274.72/7,917.84 = 3,087.72/x
  3. Step 3: Cross multiply
    5,274.72x = 7,917.84 × 3,087.72
  4. Step 4: Simplify right side
    5,274.72x = 24,448,072.92
  5. Step 5: Solve for x
    x = 24,448,072.92/5,274.72
  6. Step 6: Final answer
    x = 4,634.95

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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.