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Finding the Fourth Proportional to 455.70, 628.89 and 269.22

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Solution

The fourth proportional to 455.70, 628.89 and 269.22 is: 371.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    455.70 : 628.89 = 269.22 : x
  2. Step 2: Convert to fraction form
    455.70/628.89 = 269.22/x
  3. Step 3: Cross multiply
    455.70x = 628.89 × 269.22
  4. Step 4: Simplify right side
    455.70x = 169,309.77
  5. Step 5: Solve for x
    x = 169,309.77/455.70
  6. Step 6: Final answer
    x = 371.54

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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.