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Finding the Fourth Proportional to 3,478.76, 5,213.64 and 2,654

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Solution

The fourth proportional to 3,478.76, 5,213.64 and 2,654 is: 3,977.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,478.76 : 5,213.64 = 2,654 : x
  2. Step 2: Convert to fraction form
    3,478.76/5,213.64 = 2,654/x
  3. Step 3: Cross multiply
    3,478.76x = 5,213.64 × 2,654
  4. Step 4: Simplify right side
    3,478.76x = 13,837,000.56
  5. Step 5: Solve for x
    x = 13,837,000.56/3,478.76
  6. Step 6: Final answer
    x = 3,977.57

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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.