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Finding the Third Proportional to 647.37 and 878.98

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Solution

The third proportional to 647.37 and 878.98 is: 1,193.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    647.37 : 878.98 = 878.98 : x
  2. Step 2: Convert to fraction form
    647.37/878.98 = 878.98/x
  3. Step 3: Cross multiply
    647.37x = 878.98 × 878.98
  4. Step 4: Simplify right side
    647.37x = 772,599.80
  5. Step 5: Solve for x
    x = 772,599.80/647.37
  6. Step 6: Final answer
    x = 1,193.45

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Why These Related Problems?

These problems maintain the same ratio (1.36) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.