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Finding the Third Proportional to 143.81 and 318

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Solution

The third proportional to 143.81 and 318 is: 703.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    143.81 : 318 = 318 : x
  2. Step 2: Convert to fraction form
    143.81/318 = 318/x
  3. Step 3: Cross multiply
    143.81x = 318 × 318
  4. Step 4: Simplify right side
    143.81x = 101,124
  5. Step 5: Solve for x
    x = 101,124/143.81
  6. Step 6: Final answer
    x = 703.17

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Why These Related Problems?

These problems maintain the same ratio (2.21) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.