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Finding the Fourth Proportional to 1,368.25, 2,049.66 and 636.82

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Solution

The fourth proportional to 1,368.25, 2,049.66 and 636.82 is: 953.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,368.25 : 2,049.66 = 636.82 : x
  2. Step 2: Convert to fraction form
    1,368.25/2,049.66 = 636.82/x
  3. Step 3: Cross multiply
    1,368.25x = 2,049.66 × 636.82
  4. Step 4: Simplify right side
    1,368.25x = 1,305,264.48
  5. Step 5: Solve for x
    x = 1,305,264.48/1,368.25
  6. Step 6: Final answer
    x = 953.97

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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.