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Finding the Fourth Proportional to 3,131.68, 4,698.06 and 940.54

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Solution

The fourth proportional to 3,131.68, 4,698.06 and 940.54 is: 1,410.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,131.68 : 4,698.06 = 940.54 : x
  2. Step 2: Convert to fraction form
    3,131.68/4,698.06 = 940.54/x
  3. Step 3: Cross multiply
    3,131.68x = 4,698.06 × 940.54
  4. Step 4: Simplify right side
    3,131.68x = 4,418,713.35
  5. Step 5: Solve for x
    x = 4,418,713.35/3,131.68
  6. Step 6: Final answer
    x = 1,410.97

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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.