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Finding the Fourth Proportional to 304.45, 456.82 and 142.11

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Solution

The fourth proportional to 304.45, 456.82 and 142.11 is: 213.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    304.45 : 456.82 = 142.11 : x
  2. Step 2: Convert to fraction form
    304.45/456.82 = 142.11/x
  3. Step 3: Cross multiply
    304.45x = 456.82 × 142.11
  4. Step 4: Simplify right side
    304.45x = 64,918.69
  5. Step 5: Solve for x
    x = 64,918.69/304.45
  6. Step 6: Final answer
    x = 213.23

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.