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Finding the Fourth Proportional to 304.54, 455.78 and 220.80

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Solution

The fourth proportional to 304.54, 455.78 and 220.80 is: 330.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    304.54 : 455.78 = 220.80 : x
  2. Step 2: Convert to fraction form
    304.54/455.78 = 220.80/x
  3. Step 3: Cross multiply
    304.54x = 455.78 × 220.80
  4. Step 4: Simplify right side
    304.54x = 100,636.22
  5. Step 5: Solve for x
    x = 100,636.22/304.54
  6. Step 6: Final answer
    x = 330.45

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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.