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Finding the Fourth Proportional to 455.43, 682.37 and 290.51

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Solution

The fourth proportional to 455.43, 682.37 and 290.51 is: 435.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    455.43 : 682.37 = 290.51 : x
  2. Step 2: Convert to fraction form
    455.43/682.37 = 290.51/x
  3. Step 3: Cross multiply
    455.43x = 682.37 × 290.51
  4. Step 4: Simplify right side
    455.43x = 198,230.44
  5. Step 5: Solve for x
    x = 198,230.44/455.43
  6. Step 6: Final answer
    x = 435.26

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.