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Finding the Third Proportional to 635.50 and 986.38

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Solution

The third proportional to 635.50 and 986.38 is: 1,530.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    635.50 : 986.38 = 986.38 : x
  2. Step 2: Convert to fraction form
    635.50/986.38 = 986.38/x
  3. Step 3: Cross multiply
    635.50x = 986.38 × 986.38
  4. Step 4: Simplify right side
    635.50x = 972,935.64
  5. Step 5: Solve for x
    x = 972,935.64/635.50
  6. Step 6: Final answer
    x = 1,530.98

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Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.