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Finding the Third Proportional to 248.06 and 392.40

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Solution

The third proportional to 248.06 and 392.40 is: 620.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    248.06 : 392.40 = 392.40 : x
  2. Step 2: Convert to fraction form
    248.06/392.40 = 392.40/x
  3. Step 3: Cross multiply
    248.06x = 392.40 × 392.40
  4. Step 4: Simplify right side
    248.06x = 153,975.00
  5. Step 5: Solve for x
    x = 153,975.00/248.06
  6. Step 6: Final answer
    x = 620.71

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Why These Related Problems?

These problems maintain the same ratio (1.58) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.