Home / 1,832.12-2,747.06-720.20

Finding the Fourth Proportional to 1,832.12, 2,747.06 and 720.20

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Solution

The fourth proportional to 1,832.12, 2,747.06 and 720.20 is: 1,079.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,832.12 : 2,747.06 = 720.20 : x
  2. Step 2: Convert to fraction form
    1,832.12/2,747.06 = 720.20/x
  3. Step 3: Cross multiply
    1,832.12x = 2,747.06 × 720.20
  4. Step 4: Simplify right side
    1,832.12x = 1,978,430.81
  5. Step 5: Solve for x
    x = 1,978,430.81/1,832.12
  6. Step 6: Final answer
    x = 1,079.86

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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.