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Finding the Third Proportional to 45 and 64.50

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Solution

The third proportional to 45 and 64.50 is: 92.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    45 : 64.50 = 64.50 : x
  2. Step 2: Convert to fraction form
    45/64.50 = 64.50/x
  3. Step 3: Cross multiply
    45x = 64.50 × 64.50
  4. Step 4: Simplify right side
    45x = 4,160.25
  5. Step 5: Solve for x
    x = 4,160.25/45
  6. Step 6: Final answer
    x = 92.45

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Why These Related Problems?

These problems maintain the same ratio (1.43) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.