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Finding the Fourth Proportional to 347.87, 520.83 and 255.42

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Solution

The fourth proportional to 347.87, 520.83 and 255.42 is: 382.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    347.87 : 520.83 = 255.42 : x
  2. Step 2: Convert to fraction form
    347.87/520.83 = 255.42/x
  3. Step 3: Cross multiply
    347.87x = 520.83 × 255.42
  4. Step 4: Simplify right side
    347.87x = 133,030.40
  5. Step 5: Solve for x
    x = 133,030.40/347.87
  6. Step 6: Final answer
    x = 382.41

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.