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Finding the Fourth Proportional to 377.81, 521.39 and 220.42

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Solution

The fourth proportional to 377.81, 521.39 and 220.42 is: 304.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    377.81 : 521.39 = 220.42 : x
  2. Step 2: Convert to fraction form
    377.81/521.39 = 220.42/x
  3. Step 3: Cross multiply
    377.81x = 521.39 × 220.42
  4. Step 4: Simplify right side
    377.81x = 114,925.42
  5. Step 5: Solve for x
    x = 114,925.42/377.81
  6. Step 6: Final answer
    x = 304.19

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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.