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Finding the Fourth Proportional to 304.48, 456.54 and 142.20

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Solution

The fourth proportional to 304.48, 456.54 and 142.20 is: 213.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    304.48 : 456.54 = 142.20 : x
  2. Step 2: Convert to fraction form
    304.48/456.54 = 142.20/x
  3. Step 3: Cross multiply
    304.48x = 456.54 × 142.20
  4. Step 4: Simplify right side
    304.48x = 64,919.99
  5. Step 5: Solve for x
    x = 64,919.99/304.48
  6. Step 6: Final answer
    x = 213.22

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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.