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Finding the Fourth Proportional to 2,756.31, 4,134.66 and 808.56

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Solution

The fourth proportional to 2,756.31, 4,134.66 and 808.56 is: 1,212.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,756.31 : 4,134.66 = 808.56 : x
  2. Step 2: Convert to fraction form
    2,756.31/4,134.66 = 808.56/x
  3. Step 3: Cross multiply
    2,756.31x = 4,134.66 × 808.56
  4. Step 4: Simplify right side
    2,756.31x = 3,343,120.69
  5. Step 5: Solve for x
    x = 3,343,120.69/2,756.31
  6. Step 6: Final answer
    x = 1,212.90

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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.