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Finding the Fourth Proportional to 5,165.72, 7,742.40 and 2,388.60

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Solution

The fourth proportional to 5,165.72, 7,742.40 and 2,388.60 is: 3,580.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,165.72 : 7,742.40 = 2,388.60 : x
  2. Step 2: Convert to fraction form
    5,165.72/7,742.40 = 2,388.60/x
  3. Step 3: Cross multiply
    5,165.72x = 7,742.40 × 2,388.60
  4. Step 4: Simplify right side
    5,165.72x = 18,493,496.64
  5. Step 5: Solve for x
    x = 18,493,496.64/5,165.72
  6. Step 6: Final answer
    x = 3,580.04

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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.