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Finding the Fourth Proportional to 1,257.45, 1,736.97 and 966.36

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Solution

The fourth proportional to 1,257.45, 1,736.97 and 966.36 is: 1,334.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,257.45 : 1,736.97 = 966.36 : x
  2. Step 2: Convert to fraction form
    1,257.45/1,736.97 = 966.36/x
  3. Step 3: Cross multiply
    1,257.45x = 1,736.97 × 966.36
  4. Step 4: Simplify right side
    1,257.45x = 1,678,535.44
  5. Step 5: Solve for x
    x = 1,678,535.44/1,257.45
  6. Step 6: Final answer
    x = 1,334.87

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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.