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Finding the Fourth Proportional to 455.94, 629.22 and 281.32

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Solution

The fourth proportional to 455.94, 629.22 and 281.32 is: 388.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    455.94 : 629.22 = 281.32 : x
  2. Step 2: Convert to fraction form
    455.94/629.22 = 281.32/x
  3. Step 3: Cross multiply
    455.94x = 629.22 × 281.32
  4. Step 4: Simplify right side
    455.94x = 177,012.17
  5. Step 5: Solve for x
    x = 177,012.17/455.94
  6. Step 6: Final answer
    x = 388.24

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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.