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Finding the Third Proportional to 2,985 and 6,455

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Solution

The third proportional to 2,985 and 6,455 is: 13,958.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,985 : 6,455 = 6,455 : x
  2. Step 2: Convert to fraction form
    2,985/6,455 = 6,455/x
  3. Step 3: Cross multiply
    2,985x = 6,455 × 6,455
  4. Step 4: Simplify right side
    2,985x = 41,667,025
  5. Step 5: Solve for x
    x = 41,667,025/2,985
  6. Step 6: Final answer
    x = 13,958.80

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Why These Related Problems?

These problems maintain the same ratio (2.16) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.