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Finding the Fourth Proportional to 397.44, 546.16 and 379.38

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Solution

The fourth proportional to 397.44, 546.16 and 379.38 is: 521.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    397.44 : 546.16 = 379.38 : x
  2. Step 2: Convert to fraction form
    397.44/546.16 = 379.38/x
  3. Step 3: Cross multiply
    397.44x = 546.16 × 379.38
  4. Step 4: Simplify right side
    397.44x = 207,202.18
  5. Step 5: Solve for x
    x = 207,202.18/397.44
  6. Step 6: Final answer
    x = 521.34

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.