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Finding the Fourth Proportional to 3,656.70, 5,489.10 and 2,838.60

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Solution

The fourth proportional to 3,656.70, 5,489.10 and 2,838.60 is: 4,261.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,656.70 : 5,489.10 = 2,838.60 : x
  2. Step 2: Convert to fraction form
    3,656.70/5,489.10 = 2,838.60/x
  3. Step 3: Cross multiply
    3,656.70x = 5,489.10 × 2,838.60
  4. Step 4: Simplify right side
    3,656.70x = 15,581,359.26
  5. Step 5: Solve for x
    x = 15,581,359.26/3,656.70
  6. Step 6: Final answer
    x = 4,261.04

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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.