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Finding the Fourth Proportional to 2,756.62, 4,135.56 and 808.97

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Solution

The fourth proportional to 2,756.62, 4,135.56 and 808.97 is: 1,213.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,756.62 : 4,135.56 = 808.97 : x
  2. Step 2: Convert to fraction form
    2,756.62/4,135.56 = 808.97/x
  3. Step 3: Cross multiply
    2,756.62x = 4,135.56 × 808.97
  4. Step 4: Simplify right side
    2,756.62x = 3,345,543.97
  5. Step 5: Solve for x
    x = 3,345,543.97/2,756.62
  6. Step 6: Final answer
    x = 1,213.64

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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.