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Finding the Fourth Proportional to 304.36, 456.18 and 121.80

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Solution

The fourth proportional to 304.36, 456.18 and 121.80 is: 182.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    304.36 : 456.18 = 121.80 : x
  2. Step 2: Convert to fraction form
    304.36/456.18 = 121.80/x
  3. Step 3: Cross multiply
    304.36x = 456.18 × 121.80
  4. Step 4: Simplify right side
    304.36x = 55,564.66
  5. Step 5: Solve for x
    x = 55,564.66/304.36
  6. Step 6: Final answer
    x = 182.56

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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.