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Finding the Fourth Proportional to 455.07, 628.11 and 338.43

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Solution

The fourth proportional to 455.07, 628.11 and 338.43 is: 467.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    455.07 : 628.11 = 338.43 : x
  2. Step 2: Convert to fraction form
    455.07/628.11 = 338.43/x
  3. Step 3: Cross multiply
    455.07x = 628.11 × 338.43
  4. Step 4: Simplify right side
    455.07x = 212,571.27
  5. Step 5: Solve for x
    x = 212,571.27/455.07
  6. Step 6: Final answer
    x = 467.12

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.