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Finding the Fourth Proportional to 5,720.80, 8,581.20 and 2,027.20

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Solution

The fourth proportional to 5,720.80, 8,581.20 and 2,027.20 is: 3,040.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,720.80 : 8,581.20 = 2,027.20 : x
  2. Step 2: Convert to fraction form
    5,720.80/8,581.20 = 2,027.20/x
  3. Step 3: Cross multiply
    5,720.80x = 8,581.20 × 2,027.20
  4. Step 4: Simplify right side
    5,720.80x = 17,395,808.64
  5. Step 5: Solve for x
    x = 17,395,808.64/5,720.80
  6. Step 6: Final answer
    x = 3,040.80

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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.