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Finding the Third Proportional to 985.50 and 1,167

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Solution

The third proportional to 985.50 and 1,167 is: 1,381.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    985.50 : 1,167 = 1,167 : x
  2. Step 2: Convert to fraction form
    985.50/1,167 = 1,167/x
  3. Step 3: Cross multiply
    985.50x = 1,167 × 1,167
  4. Step 4: Simplify right side
    985.50x = 1,361,889
  5. Step 5: Solve for x
    x = 1,361,889/985.50
  6. Step 6: Final answer
    x = 1,381.93

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Why These Related Problems?

These problems maintain the same ratio (1.18) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.