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Finding the Fourth Proportional to 5,256.72, 7,882.79 and 2,790.95

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Solution

The fourth proportional to 5,256.72, 7,882.79 and 2,790.95 is: 4,185.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,256.72 : 7,882.79 = 2,790.95 : x
  2. Step 2: Convert to fraction form
    5,256.72/7,882.79 = 2,790.95/x
  3. Step 3: Cross multiply
    5,256.72x = 7,882.79 × 2,790.95
  4. Step 4: Simplify right side
    5,256.72x = 22,000,419.38
  5. Step 5: Solve for x
    x = 22,000,419.38/5,256.72
  6. Step 6: Final answer
    x = 4,185.20

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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.