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Finding the Third Proportional to 248.70 and 370.20

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Solution

The third proportional to 248.70 and 370.20 is: 551.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    248.70 : 370.20 = 370.20 : x
  2. Step 2: Convert to fraction form
    248.70/370.20 = 370.20/x
  3. Step 3: Cross multiply
    248.70x = 370.20 × 370.20
  4. Step 4: Simplify right side
    248.70x = 137,044.57
  5. Step 5: Solve for x
    x = 137,044.57/248.70
  6. Step 6: Final answer
    x = 551.05

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.