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Finding the Fourth Proportional to 455.79, 628.82 and 269.22

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Solution

The fourth proportional to 455.79, 628.82 and 269.22 is: 371.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    455.79 : 628.82 = 269.22 : x
  2. Step 2: Convert to fraction form
    455.79/628.82 = 269.22/x
  3. Step 3: Cross multiply
    455.79x = 628.82 × 269.22
  4. Step 4: Simplify right side
    455.79x = 169,289.57
  5. Step 5: Solve for x
    x = 169,289.57/455.79
  6. Step 6: Final answer
    x = 371.42

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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.