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Finding the Fourth Proportional to 313.56, 469.49 and 255.54

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Solution

The fourth proportional to 313.56, 469.49 and 255.54 is: 382.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    313.56 : 469.49 = 255.54 : x
  2. Step 2: Convert to fraction form
    313.56/469.49 = 255.54/x
  3. Step 3: Cross multiply
    313.56x = 469.49 × 255.54
  4. Step 4: Simplify right side
    313.56x = 119,973.47
  5. Step 5: Solve for x
    x = 119,973.47/313.56
  6. Step 6: Final answer
    x = 382.62

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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.