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Finding the Fourth Proportional to 3,478.55, 5,221.87 and 2,748.53

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Solution

The fourth proportional to 3,478.55, 5,221.87 and 2,748.53 is: 4,126.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,478.55 : 5,221.87 = 2,748.53 : x
  2. Step 2: Convert to fraction form
    3,478.55/5,221.87 = 2,748.53/x
  3. Step 3: Cross multiply
    3,478.55x = 5,221.87 × 2,748.53
  4. Step 4: Simplify right side
    3,478.55x = 14,352,472.53
  5. Step 5: Solve for x
    x = 14,352,472.53/3,478.55
  6. Step 6: Final answer
    x = 4,126.00

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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.