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Finding the Fourth Proportional to 548.80, 822.48 and 305

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Solution

The fourth proportional to 548.80, 822.48 and 305 is: 457.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    548.80 : 822.48 = 305 : x
  2. Step 2: Convert to fraction form
    548.80/822.48 = 305/x
  3. Step 3: Cross multiply
    548.80x = 822.48 × 305
  4. Step 4: Simplify right side
    548.80x = 250,856.40
  5. Step 5: Solve for x
    x = 250,856.40/548.80
  6. Step 6: Final answer
    x = 457.10

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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.