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Finding the Fourth Proportional to 3,906.56, 5,859.68 and 1,309.12

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Solution

The fourth proportional to 3,906.56, 5,859.68 and 1,309.12 is: 1,963.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,906.56 : 5,859.68 = 1,309.12 : x
  2. Step 2: Convert to fraction form
    3,906.56/5,859.68 = 1,309.12/x
  3. Step 3: Cross multiply
    3,906.56x = 5,859.68 × 1,309.12
  4. Step 4: Simplify right side
    3,906.56x = 7,671,024.28
  5. Step 5: Solve for x
    x = 7,671,024.28/3,906.56
  6. Step 6: Final answer
    x = 1,963.63

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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.