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Finding the Fourth Proportional to 305.84, 421.97 and 181.51

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Solution

The fourth proportional to 305.84, 421.97 and 181.51 is: 250.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    305.84 : 421.97 = 181.51 : x
  2. Step 2: Convert to fraction form
    305.84/421.97 = 181.51/x
  3. Step 3: Cross multiply
    305.84x = 421.97 × 181.51
  4. Step 4: Simplify right side
    305.84x = 76,589.81
  5. Step 5: Solve for x
    x = 76,589.81/305.84
  6. Step 6: Final answer
    x = 250.42

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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.