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Finding the Third Proportional to 647.25 and 971.25

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Solution

The third proportional to 647.25 and 971.25 is: 1,457.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    647.25 : 971.25 = 971.25 : x
  2. Step 2: Convert to fraction form
    647.25/971.25 = 971.25/x
  3. Step 3: Cross multiply
    647.25x = 971.25 × 971.25
  4. Step 4: Simplify right side
    647.25x = 943,326.56
  5. Step 5: Solve for x
    x = 943,326.56/647.25
  6. Step 6: Final answer
    x = 1,457.44

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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.