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Finding the Fourth Proportional to 547.16, 755.02 and 311.09

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Solution

The fourth proportional to 547.16, 755.02 and 311.09 is: 429.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    547.16 : 755.02 = 311.09 : x
  2. Step 2: Convert to fraction form
    547.16/755.02 = 311.09/x
  3. Step 3: Cross multiply
    547.16x = 755.02 × 311.09
  4. Step 4: Simplify right side
    547.16x = 234,879.17
  5. Step 5: Solve for x
    x = 234,879.17/547.16
  6. Step 6: Final answer
    x = 429.27

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.