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Finding the Fourth Proportional to 2,203.16, 3,305.12 and 742.32

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Solution

The fourth proportional to 2,203.16, 3,305.12 and 742.32 is: 1,113.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,203.16 : 3,305.12 = 742.32 : x
  2. Step 2: Convert to fraction form
    2,203.16/3,305.12 = 742.32/x
  3. Step 3: Cross multiply
    2,203.16x = 3,305.12 × 742.32
  4. Step 4: Simplify right side
    2,203.16x = 2,453,452.97
  5. Step 5: Solve for x
    x = 2,453,452.97/2,203.16
  6. Step 6: Final answer
    x = 1,113.61

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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.