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Finding the Fourth Proportional to 3,452.13, 5,178.20 and 855.07

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Solution

The fourth proportional to 3,452.13, 5,178.20 and 855.07 is: 1,282.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,452.13 : 5,178.20 = 855.07 : x
  2. Step 2: Convert to fraction form
    3,452.13/5,178.20 = 855.07/x
  3. Step 3: Cross multiply
    3,452.13x = 5,178.20 × 855.07
  4. Step 4: Simplify right side
    3,452.13x = 4,427,723.47
  5. Step 5: Solve for x
    x = 4,427,723.47/3,452.13
  6. Step 6: Final answer
    x = 1,282.61

Related Problems

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Double scale
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Similar ratio
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1.5x scale

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.