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Finding the Fourth Proportional to 456.24, 629.64 and 281.56

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Solution

The fourth proportional to 456.24, 629.64 and 281.56 is: 388.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    456.24 : 629.64 = 281.56 : x
  2. Step 2: Convert to fraction form
    456.24/629.64 = 281.56/x
  3. Step 3: Cross multiply
    456.24x = 629.64 × 281.56
  4. Step 4: Simplify right side
    456.24x = 177,281.44
  5. Step 5: Solve for x
    x = 177,281.44/456.24
  6. Step 6: Final answer
    x = 388.57

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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.