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Finding the Fourth Proportional to 377.81, 521.34 and 220.49

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Solution

The fourth proportional to 377.81, 521.34 and 220.49 is: 304.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    377.81 : 521.34 = 220.49 : x
  2. Step 2: Convert to fraction form
    377.81/521.34 = 220.49/x
  3. Step 3: Cross multiply
    377.81x = 521.34 × 220.49
  4. Step 4: Simplify right side
    377.81x = 114,948.78
  5. Step 5: Solve for x
    x = 114,948.78/377.81
  6. Step 6: Final answer
    x = 304.25

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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.