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Finding the Fourth Proportional to 1,199.05, 1,799.34 and 1,108.87

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Solution

The fourth proportional to 1,199.05, 1,799.34 and 1,108.87 is: 1,664.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,199.05 : 1,799.34 = 1,108.87 : x
  2. Step 2: Convert to fraction form
    1,199.05/1,799.34 = 1,108.87/x
  3. Step 3: Cross multiply
    1,199.05x = 1,799.34 × 1,108.87
  4. Step 4: Simplify right side
    1,199.05x = 1,995,234.15
  5. Step 5: Solve for x
    x = 1,995,234.15/1,199.05
  6. Step 6: Final answer
    x = 1,664.01

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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.