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Finding the Third Proportional to 518.50 and 1,148

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Solution

The third proportional to 518.50 and 1,148 is: 2,541.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    518.50 : 1,148 = 1,148 : x
  2. Step 2: Convert to fraction form
    518.50/1,148 = 1,148/x
  3. Step 3: Cross multiply
    518.50x = 1,148 × 1,148
  4. Step 4: Simplify right side
    518.50x = 1,317,904
  5. Step 5: Solve for x
    x = 1,317,904/518.50
  6. Step 6: Final answer
    x = 2,541.76

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Why These Related Problems?

These problems maintain the same ratio (2.21) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.