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Finding the Fourth Proportional to 455.61, 628.76 and 269.11

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Solution

The fourth proportional to 455.61, 628.76 and 269.11 is: 371.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    455.61 : 628.76 = 269.11 : x
  2. Step 2: Convert to fraction form
    455.61/628.76 = 269.11/x
  3. Step 3: Cross multiply
    455.61x = 628.76 × 269.11
  4. Step 4: Simplify right side
    455.61x = 169,205.60
  5. Step 5: Solve for x
    x = 169,205.60/455.61
  6. Step 6: Final answer
    x = 371.38

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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.