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Finding the Fourth Proportional to 456.12, 629.22 and 290.26

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Solution

The fourth proportional to 456.12, 629.22 and 290.26 is: 400.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    456.12 : 629.22 = 290.26 : x
  2. Step 2: Convert to fraction form
    456.12/629.22 = 290.26/x
  3. Step 3: Cross multiply
    456.12x = 629.22 × 290.26
  4. Step 4: Simplify right side
    456.12x = 182,637.40
  5. Step 5: Solve for x
    x = 182,637.40/456.12
  6. Step 6: Final answer
    x = 400.42

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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.