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Finding the Fourth Proportional to 455.91, 629.15 and 248.91

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Solution

The fourth proportional to 455.91, 629.15 and 248.91 is: 343.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    455.91 : 629.15 = 248.91 : x
  2. Step 2: Convert to fraction form
    455.91/629.15 = 248.91/x
  3. Step 3: Cross multiply
    455.91x = 629.15 × 248.91
  4. Step 4: Simplify right side
    455.91x = 156,599.99
  5. Step 5: Solve for x
    x = 156,599.99/455.91
  6. Step 6: Final answer
    x = 343.49

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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.