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Finding the Third Proportional to 578.50 and 677.50

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Solution

The third proportional to 578.50 and 677.50 is: 793.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    578.50 : 677.50 = 677.50 : x
  2. Step 2: Convert to fraction form
    578.50/677.50 = 677.50/x
  3. Step 3: Cross multiply
    578.50x = 677.50 × 677.50
  4. Step 4: Simplify right side
    578.50x = 459,006.25
  5. Step 5: Solve for x
    x = 459,006.25/578.50
  6. Step 6: Final answer
    x = 793.44

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Why These Related Problems?

These problems maintain the same ratio (1.17) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.