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Finding the Fourth Proportional to 377.47, 520.91 and 211.74

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Solution

The fourth proportional to 377.47, 520.91 and 211.74 is: 292.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    377.47 : 520.91 = 211.74 : x
  2. Step 2: Convert to fraction form
    377.47/520.91 = 211.74/x
  3. Step 3: Cross multiply
    377.47x = 520.91 × 211.74
  4. Step 4: Simplify right side
    377.47x = 110,297.47
  5. Step 5: Solve for x
    x = 110,297.47/377.47
  6. Step 6: Final answer
    x = 292.20

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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.