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Finding the Third Proportional to 215 and 471

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Solution

The third proportional to 215 and 471 is: 1,031.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    215 : 471 = 471 : x
  2. Step 2: Convert to fraction form
    215/471 = 471/x
  3. Step 3: Cross multiply
    215x = 471 × 471
  4. Step 4: Simplify right side
    215x = 221,841
  5. Step 5: Solve for x
    x = 221,841/215
  6. Step 6: Final answer
    x = 1,031.82

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Why These Related Problems?

These problems maintain the same ratio (2.19) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.