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Finding the Fourth Proportional to 555.16, 769.28 and 548.44

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Solution

The fourth proportional to 555.16, 769.28 and 548.44 is: 759.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    555.16 : 769.28 = 548.44 : x
  2. Step 2: Convert to fraction form
    555.16/769.28 = 548.44/x
  3. Step 3: Cross multiply
    555.16x = 769.28 × 548.44
  4. Step 4: Simplify right side
    555.16x = 421,903.92
  5. Step 5: Solve for x
    x = 421,903.92/555.16
  6. Step 6: Final answer
    x = 759.97

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.