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Finding the Fourth Proportional to 3,906.63, 5,390.91 and 2,313.27

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Solution

The fourth proportional to 3,906.63, 5,390.91 and 2,313.27 is: 3,192.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,906.63 : 5,390.91 = 2,313.27 : x
  2. Step 2: Convert to fraction form
    3,906.63/5,390.91 = 2,313.27/x
  3. Step 3: Cross multiply
    3,906.63x = 5,390.91 × 2,313.27
  4. Step 4: Simplify right side
    3,906.63x = 12,470,630.38
  5. Step 5: Solve for x
    x = 12,470,630.38/3,906.63
  6. Step 6: Final answer
    x = 3,192.17

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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.