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Finding the Fourth Proportional to 377.12, 520.20 and 239.12

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Solution

The fourth proportional to 377.12, 520.20 and 239.12 is: 329.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    377.12 : 520.20 = 239.12 : x
  2. Step 2: Convert to fraction form
    377.12/520.20 = 239.12/x
  3. Step 3: Cross multiply
    377.12x = 520.20 × 239.12
  4. Step 4: Simplify right side
    377.12x = 124,390.22
  5. Step 5: Solve for x
    x = 124,390.22/377.12
  6. Step 6: Final answer
    x = 329.84

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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.