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Finding the Third Proportional to 665 and 1,054

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Solution

The third proportional to 665 and 1,054 is: 1,670.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    665 : 1,054 = 1,054 : x
  2. Step 2: Convert to fraction form
    665/1,054 = 1,054/x
  3. Step 3: Cross multiply
    665x = 1,054 × 1,054
  4. Step 4: Simplify right side
    665x = 1,110,916
  5. Step 5: Solve for x
    x = 1,110,916/665
  6. Step 6: Final answer
    x = 1,670.55

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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.