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Finding the Third Proportional to 915 and 2,098.50

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Solution

The third proportional to 915 and 2,098.50 is: 4,812.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    915 : 2,098.50 = 2,098.50 : x
  2. Step 2: Convert to fraction form
    915/2,098.50 = 2,098.50/x
  3. Step 3: Cross multiply
    915x = 2,098.50 × 2,098.50
  4. Step 4: Simplify right side
    915x = 4,403,702.25
  5. Step 5: Solve for x
    x = 4,403,702.25/915
  6. Step 6: Final answer
    x = 4,812.79

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Why These Related Problems?

These problems maintain the same ratio (2.29) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.