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Finding the Fourth Proportional to 548.20, 820.25 and 304.90

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Solution

The fourth proportional to 548.20, 820.25 and 304.90 is: 456.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    548.20 : 820.25 = 304.90 : x
  2. Step 2: Convert to fraction form
    548.20/820.25 = 304.90/x
  3. Step 3: Cross multiply
    548.20x = 820.25 × 304.90
  4. Step 4: Simplify right side
    548.20x = 250,094.23
  5. Step 5: Solve for x
    x = 250,094.23/548.20
  6. Step 6: Final answer
    x = 456.21

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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.