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Finding the Fourth Proportional to 456.23, 629.71 and 281.47

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Solution

The fourth proportional to 456.23, 629.71 and 281.47 is: 388.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    456.23 : 629.71 = 281.47 : x
  2. Step 2: Convert to fraction form
    456.23/629.71 = 281.47/x
  3. Step 3: Cross multiply
    456.23x = 629.71 × 281.47
  4. Step 4: Simplify right side
    456.23x = 177,244.47
  5. Step 5: Solve for x
    x = 177,244.47/456.23
  6. Step 6: Final answer
    x = 388.50

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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.