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Finding the Fourth Proportional to 455.26, 628.24 and 248.26

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Solution

The fourth proportional to 455.26, 628.24 and 248.26 is: 342.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    455.26 : 628.24 = 248.26 : x
  2. Step 2: Convert to fraction form
    455.26/628.24 = 248.26/x
  3. Step 3: Cross multiply
    455.26x = 628.24 × 248.26
  4. Step 4: Simplify right side
    455.26x = 155,966.86
  5. Step 5: Solve for x
    x = 155,966.86/455.26
  6. Step 6: Final answer
    x = 342.59

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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.