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Finding the Fourth Proportional to 3,778.65, 5,659.17 and 3,311.53

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Solution

The fourth proportional to 3,778.65, 5,659.17 and 3,311.53 is: 4,959.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,778.65 : 5,659.17 = 3,311.53 : x
  2. Step 2: Convert to fraction form
    3,778.65/5,659.17 = 3,311.53/x
  3. Step 3: Cross multiply
    3,778.65x = 5,659.17 × 3,311.53
  4. Step 4: Simplify right side
    3,778.65x = 18,740,516.50
  5. Step 5: Solve for x
    x = 18,740,516.50/3,778.65
  6. Step 6: Final answer
    x = 4,959.58

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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.