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Finding the Fourth Proportional to 455.67, 628.79 and 269.11

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Solution

The fourth proportional to 455.67, 628.79 and 269.11 is: 371.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    455.67 : 628.79 = 269.11 : x
  2. Step 2: Convert to fraction form
    455.67/628.79 = 269.11/x
  3. Step 3: Cross multiply
    455.67x = 628.79 × 269.11
  4. Step 4: Simplify right side
    455.67x = 169,213.68
  5. Step 5: Solve for x
    x = 169,213.68/455.67
  6. Step 6: Final answer
    x = 371.36

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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.