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Finding the Fourth Proportional to 377.39, 520.72 and 220

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Solution

The fourth proportional to 377.39, 520.72 and 220 is: 303.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    377.39 : 520.72 = 220 : x
  2. Step 2: Convert to fraction form
    377.39/520.72 = 220/x
  3. Step 3: Cross multiply
    377.39x = 520.72 × 220
  4. Step 4: Simplify right side
    377.39x = 114,558.40
  5. Step 5: Solve for x
    x = 114,558.40/377.39
  6. Step 6: Final answer
    x = 303.55

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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.