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Finding the Fourth Proportional to 320.84, 442.79 and 181.01

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Solution

The fourth proportional to 320.84, 442.79 and 181.01 is: 249.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    320.84 : 442.79 = 181.01 : x
  2. Step 2: Convert to fraction form
    320.84/442.79 = 181.01/x
  3. Step 3: Cross multiply
    320.84x = 442.79 × 181.01
  4. Step 4: Simplify right side
    320.84x = 80,146.30
  5. Step 5: Solve for x
    x = 80,146.30/320.84
  6. Step 6: Final answer
    x = 249.81

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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.