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Finding the Fourth Proportional to 377.75, 521.36 and 220.40

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Solution

The fourth proportional to 377.75, 521.36 and 220.40 is: 304.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    377.75 : 521.36 = 220.40 : x
  2. Step 2: Convert to fraction form
    377.75/521.36 = 220.40/x
  3. Step 3: Cross multiply
    377.75x = 521.36 × 220.40
  4. Step 4: Simplify right side
    377.75x = 114,907.74
  5. Step 5: Solve for x
    x = 114,907.74/377.75
  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.