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Finding the Fourth Proportional to 548.85, 819.94 and 418.48

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Solution

The fourth proportional to 548.85, 819.94 and 418.48 is: 625.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    548.85 : 819.94 = 418.48 : x
  2. Step 2: Convert to fraction form
    548.85/819.94 = 418.48/x
  3. Step 3: Cross multiply
    548.85x = 819.94 × 418.48
  4. Step 4: Simplify right side
    548.85x = 343,130.79
  5. Step 5: Solve for x
    x = 343,130.79/548.85
  6. Step 6: Final answer
    x = 625.18

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.