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Finding the Fourth Proportional to 493.68, 739.53 and 255.81

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Solution

The fourth proportional to 493.68, 739.53 and 255.81 is: 383.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    493.68 : 739.53 = 255.81 : x
  2. Step 2: Convert to fraction form
    493.68/739.53 = 255.81/x
  3. Step 3: Cross multiply
    493.68x = 739.53 × 255.81
  4. Step 4: Simplify right side
    493.68x = 189,179.17
  5. Step 5: Solve for x
    x = 189,179.17/493.68
  6. Step 6: Final answer
    x = 383.20

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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.