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Finding the Fourth Proportional to 377.05, 520.31 and 211.23

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Solution

The fourth proportional to 377.05, 520.31 and 211.23 is: 291.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    377.05 : 520.31 = 211.23 : x
  2. Step 2: Convert to fraction form
    377.05/520.31 = 211.23/x
  3. Step 3: Cross multiply
    377.05x = 520.31 × 211.23
  4. Step 4: Simplify right side
    377.05x = 109,905.08
  5. Step 5: Solve for x
    x = 109,905.08/377.05
  6. Step 6: Final answer
    x = 291.49

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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.