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Finding the Fourth Proportional to 5,778.73, 7,974.76 and 3,390.42

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Solution

The fourth proportional to 5,778.73, 7,974.76 and 3,390.42 is: 4,678.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,778.73 : 7,974.76 = 3,390.42 : x
  2. Step 2: Convert to fraction form
    5,778.73/7,974.76 = 3,390.42/x
  3. Step 3: Cross multiply
    5,778.73x = 7,974.76 × 3,390.42
  4. Step 4: Simplify right side
    5,778.73x = 27,037,785.80
  5. Step 5: Solve for x
    x = 27,037,785.80/5,778.73
  6. Step 6: Final answer
    x = 4,678.85

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.