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Finding the Third Proportional to 645 and 968.50

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Solution

The third proportional to 645 and 968.50 is: 1,454.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    645 : 968.50 = 968.50 : x
  2. Step 2: Convert to fraction form
    645/968.50 = 968.50/x
  3. Step 3: Cross multiply
    645x = 968.50 × 968.50
  4. Step 4: Simplify right side
    645x = 937,992.25
  5. Step 5: Solve for x
    x = 937,992.25/645
  6. Step 6: Final answer
    x = 1,454.25

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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.