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Finding the Third Proportional to 31,398 and 47,417

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Solution

The third proportional to 31,398 and 47,417 is: 71,608.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,398 : 47,417 = 47,417 : x
  2. Step 2: Convert to fraction form
    31,398/47,417 = 47,417/x
  3. Step 3: Cross multiply
    31,398x = 47,417 × 47,417
  4. Step 4: Simplify right side
    31,398x = 2,248,371,889
  5. Step 5: Solve for x
    x = 2,248,371,889/31,398
  6. Step 6: Final answer
    x = 71,608.76

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.