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Finding the Fourth Proportional to 3,452.46, 5,178.65 and 855.38

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Solution

The fourth proportional to 3,452.46, 5,178.65 and 855.38 is: 1,283.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,452.46 : 5,178.65 = 855.38 : x
  2. Step 2: Convert to fraction form
    3,452.46/5,178.65 = 855.38/x
  3. Step 3: Cross multiply
    3,452.46x = 5,178.65 × 855.38
  4. Step 4: Simplify right side
    3,452.46x = 4,429,683.47
  5. Step 5: Solve for x
    x = 4,429,683.47/3,452.46
  6. Step 6: Final answer
    x = 1,283.05

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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.