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Finding the Fourth Proportional to 3,105.43, 4,658.92 and 914.15

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Solution

The fourth proportional to 3,105.43, 4,658.92 and 914.15 is: 1,371.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,105.43 : 4,658.92 = 914.15 : x
  2. Step 2: Convert to fraction form
    3,105.43/4,658.92 = 914.15/x
  3. Step 3: Cross multiply
    3,105.43x = 4,658.92 × 914.15
  4. Step 4: Simplify right side
    3,105.43x = 4,258,961.08
  5. Step 5: Solve for x
    x = 4,258,961.08/3,105.43
  6. Step 6: Final answer
    x = 1,371.46

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Double scale
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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.