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Finding the Third Proportional to 287.72 and 334.13

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Solution

The third proportional to 287.72 and 334.13 is: 388.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    287.72 : 334.13 = 334.13 : x
  2. Step 2: Convert to fraction form
    287.72/334.13 = 334.13/x
  3. Step 3: Cross multiply
    287.72x = 334.13 × 334.13
  4. Step 4: Simplify right side
    287.72x = 111,639.52
  5. Step 5: Solve for x
    x = 111,639.52/287.72
  6. Step 6: Final answer
    x = 388.02

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Why These Related Problems?

These problems maintain the same ratio (1.16) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.