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Finding the Fourth Proportional to 5,720, 7,892.80 and 3,202.24

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Solution

The fourth proportional to 5,720, 7,892.80 and 3,202.24 is: 4,418.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,720 : 7,892.80 = 3,202.24 : x
  2. Step 2: Convert to fraction form
    5,720/7,892.80 = 3,202.24/x
  3. Step 3: Cross multiply
    5,720x = 7,892.80 × 3,202.24
  4. Step 4: Simplify right side
    5,720x = 25,274,639.87
  5. Step 5: Solve for x
    x = 25,274,639.87/5,720
  6. Step 6: Final answer
    x = 4,418.64

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.