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Finding the Fourth Proportional to 1,095.54, 1,640.43 and 769.14

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Solution

The fourth proportional to 1,095.54, 1,640.43 and 769.14 is: 1,151.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,095.54 : 1,640.43 = 769.14 : x
  2. Step 2: Convert to fraction form
    1,095.54/1,640.43 = 769.14/x
  3. Step 3: Cross multiply
    1,095.54x = 1,640.43 × 769.14
  4. Step 4: Simplify right side
    1,095.54x = 1,261,720.33
  5. Step 5: Solve for x
    x = 1,261,720.33/1,095.54
  6. Step 6: Final answer
    x = 1,151.69

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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.