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Finding the Fourth Proportional to 2,213.12, 3,320 and 752.36

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Solution

The fourth proportional to 2,213.12, 3,320 and 752.36 is: 1,128.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,213.12 : 3,320 = 752.36 : x
  2. Step 2: Convert to fraction form
    2,213.12/3,320 = 752.36/x
  3. Step 3: Cross multiply
    2,213.12x = 3,320 × 752.36
  4. Step 4: Simplify right side
    2,213.12x = 2,497,835.20
  5. Step 5: Solve for x
    x = 2,497,835.20/2,213.12
  6. Step 6: Final answer
    x = 1,128.65

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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.