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Finding the Third Proportional to 55.75 and 65.63

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Solution

The third proportional to 55.75 and 65.63 is: 77.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    55.75 : 65.63 = 65.63 : x
  2. Step 2: Convert to fraction form
    55.75/65.63 = 65.63/x
  3. Step 3: Cross multiply
    55.75x = 65.63 × 65.63
  4. Step 4: Simplify right side
    55.75x = 4,306.64
  5. Step 5: Solve for x
    x = 4,306.64/55.75
  6. Step 6: Final answer
    x = 77.25

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Why These Related Problems?

These problems maintain the same ratio (1.18) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.