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Finding the Fourth Proportional to 313.60, 470.41 and 255.56

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Solution

The fourth proportional to 313.60, 470.41 and 255.56 is: 383.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    313.60 : 470.41 = 255.56 : x
  2. Step 2: Convert to fraction form
    313.60/470.41 = 255.56/x
  3. Step 3: Cross multiply
    313.60x = 470.41 × 255.56
  4. Step 4: Simplify right side
    313.60x = 120,217.98
  5. Step 5: Solve for x
    x = 120,217.98/313.60
  6. Step 6: Final answer
    x = 383.35

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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.