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Finding the Fourth Proportional to 456.33, 629.34 and 290.61

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Solution

The fourth proportional to 456.33, 629.34 and 290.61 is: 400.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    456.33 : 629.34 = 290.61 : x
  2. Step 2: Convert to fraction form
    456.33/629.34 = 290.61/x
  3. Step 3: Cross multiply
    456.33x = 629.34 × 290.61
  4. Step 4: Simplify right side
    456.33x = 182,895.63
  5. Step 5: Solve for x
    x = 182,895.63/456.33
  6. Step 6: Final answer
    x = 400.79

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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.