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Finding the Fourth Proportional to 2,756.34, 4,134.51 and 808.55

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Solution

The fourth proportional to 2,756.34, 4,134.51 and 808.55 is: 1,212.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,756.34 : 4,134.51 = 808.55 : x
  2. Step 2: Convert to fraction form
    2,756.34/4,134.51 = 808.55/x
  3. Step 3: Cross multiply
    2,756.34x = 4,134.51 × 808.55
  4. Step 4: Simplify right side
    2,756.34x = 3,342,958.06
  5. Step 5: Solve for x
    x = 3,342,958.06/2,756.34
  6. Step 6: Final answer
    x = 1,212.83

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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.