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Finding the Third Proportional to 988.50 and 2,163

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Solution

The third proportional to 988.50 and 2,163 is: 4,733.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    988.50 : 2,163 = 2,163 : x
  2. Step 2: Convert to fraction form
    988.50/2,163 = 2,163/x
  3. Step 3: Cross multiply
    988.50x = 2,163 × 2,163
  4. Step 4: Simplify right side
    988.50x = 4,678,569
  5. Step 5: Solve for x
    x = 4,678,569/988.50
  6. Step 6: Final answer
    x = 4,733.00

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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.