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Finding the Fourth Proportional to 303.99, 454.14 and 255.39

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Solution

The fourth proportional to 303.99, 454.14 and 255.39 is: 381.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    303.99 : 454.14 = 255.39 : x
  2. Step 2: Convert to fraction form
    303.99/454.14 = 255.39/x
  3. Step 3: Cross multiply
    303.99x = 454.14 × 255.39
  4. Step 4: Simplify right side
    303.99x = 115,982.81
  5. Step 5: Solve for x
    x = 115,982.81/303.99
  6. Step 6: Final answer
    x = 381.53

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.