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Finding the Fourth Proportional to 313.84, 471.57 and 255.47

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Solution

The fourth proportional to 313.84, 471.57 and 255.47 is: 383.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    313.84 : 471.57 = 255.47 : x
  2. Step 2: Convert to fraction form
    313.84/471.57 = 255.47/x
  3. Step 3: Cross multiply
    313.84x = 471.57 × 255.47
  4. Step 4: Simplify right side
    313.84x = 120,471.99
  5. Step 5: Solve for x
    x = 120,471.99/313.84
  6. Step 6: Final answer
    x = 383.86

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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.