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Finding the Third Proportional to 117.70 and 261.98

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Solution

The third proportional to 117.70 and 261.98 is: 583.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    117.70 : 261.98 = 261.98 : x
  2. Step 2: Convert to fraction form
    117.70/261.98 = 261.98/x
  3. Step 3: Cross multiply
    117.70x = 261.98 × 261.98
  4. Step 4: Simplify right side
    117.70x = 68,635.81
  5. Step 5: Solve for x
    x = 68,635.81/117.70
  6. Step 6: Final answer
    x = 583.13

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Why These Related Problems?

These problems maintain the same ratio (2.23) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.