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Finding the Third Proportional to 427.50 and 677.06

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Solution

The third proportional to 427.50 and 677.06 is: 1,072.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    427.50 : 677.06 = 677.06 : x
  2. Step 2: Convert to fraction form
    427.50/677.06 = 677.06/x
  3. Step 3: Cross multiply
    427.50x = 677.06 × 677.06
  4. Step 4: Simplify right side
    427.50x = 458,413.63
  5. Step 5: Solve for x
    x = 458,413.63/427.50
  6. Step 6: Final answer
    x = 1,072.31

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Why These Related Problems?

These problems maintain the same ratio (1.58) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.