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Finding the Fourth Proportional to 377.22, 520.60 and 211.47

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Solution

The fourth proportional to 377.22, 520.60 and 211.47 is: 291.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    377.22 : 520.60 = 211.47 : x
  2. Step 2: Convert to fraction form
    377.22/520.60 = 211.47/x
  3. Step 3: Cross multiply
    377.22x = 520.60 × 211.47
  4. Step 4: Simplify right side
    377.22x = 110,091.28
  5. Step 5: Solve for x
    x = 110,091.28/377.22
  6. Step 6: Final answer
    x = 291.85

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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.