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Finding the Third Proportional to 647.75 and 983.75

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Solution

The third proportional to 647.75 and 983.75 is: 1,494.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    647.75 : 983.75 = 983.75 : x
  2. Step 2: Convert to fraction form
    647.75/983.75 = 983.75/x
  3. Step 3: Cross multiply
    647.75x = 983.75 × 983.75
  4. Step 4: Simplify right side
    647.75x = 967,764.06
  5. Step 5: Solve for x
    x = 967,764.06/647.75
  6. Step 6: Final answer
    x = 1,494.04

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Why These Related Problems?

These problems maintain the same ratio (1.52) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.