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Finding the Third Proportional to 154.13 and 254.81

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Solution

The third proportional to 154.13 and 254.81 is: 421.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    154.13 : 254.81 = 254.81 : x
  2. Step 2: Convert to fraction form
    154.13/254.81 = 254.81/x
  3. Step 3: Cross multiply
    154.13x = 254.81 × 254.81
  4. Step 4: Simplify right side
    154.13x = 64,929.41
  5. Step 5: Solve for x
    x = 64,929.41/154.13
  6. Step 6: Final answer
    x = 421.28

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Why These Related Problems?

These problems maintain the same ratio (1.65) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.