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Finding the Third Proportional to 281.81 and 387.91

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Solution

The third proportional to 281.81 and 387.91 is: 533.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    281.81 : 387.91 = 387.91 : x
  2. Step 2: Convert to fraction form
    281.81/387.91 = 387.91/x
  3. Step 3: Cross multiply
    281.81x = 387.91 × 387.91
  4. Step 4: Simplify right side
    281.81x = 150,477.32
  5. Step 5: Solve for x
    x = 150,477.32/281.81
  6. Step 6: Final answer
    x = 533.96

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.