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Finding the Fourth Proportional to 1,081.96, 1,621.11 and 734.77

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Solution

The fourth proportional to 1,081.96, 1,621.11 and 734.77 is: 1,100.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,081.96 : 1,621.11 = 734.77 : x
  2. Step 2: Convert to fraction form
    1,081.96/1,621.11 = 734.77/x
  3. Step 3: Cross multiply
    1,081.96x = 1,621.11 × 734.77
  4. Step 4: Simplify right side
    1,081.96x = 1,191,147.78
  5. Step 5: Solve for x
    x = 1,191,147.78/1,081.96
  6. Step 6: Final answer
    x = 1,100.92

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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.