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Finding the Fourth Proportional to 2,728.08, 4,091.04 and 1,188

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Solution

The fourth proportional to 2,728.08, 4,091.04 and 1,188 is: 1,781.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,728.08 : 4,091.04 = 1,188 : x
  2. Step 2: Convert to fraction form
    2,728.08/4,091.04 = 1,188/x
  3. Step 3: Cross multiply
    2,728.08x = 4,091.04 × 1,188
  4. Step 4: Simplify right side
    2,728.08x = 4,860,155.52
  5. Step 5: Solve for x
    x = 4,860,155.52/2,728.08
  6. Step 6: Final answer
    x = 1,781.53

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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.