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Finding the Fourth Proportional to 548.25, 819.35 and 439.53

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Solution

The fourth proportional to 548.25, 819.35 and 439.53 is: 656.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    548.25 : 819.35 = 439.53 : x
  2. Step 2: Convert to fraction form
    548.25/819.35 = 439.53/x
  3. Step 3: Cross multiply
    548.25x = 819.35 × 439.53
  4. Step 4: Simplify right side
    548.25x = 360,130.00
  5. Step 5: Solve for x
    x = 360,130.00/548.25
  6. Step 6: Final answer
    x = 656.87

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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.