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Finding the Fourth Proportional to 418.96, 628.44 and 290.32

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Solution

The fourth proportional to 418.96, 628.44 and 290.32 is: 435.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    418.96 : 628.44 = 290.32 : x
  2. Step 2: Convert to fraction form
    418.96/628.44 = 290.32/x
  3. Step 3: Cross multiply
    418.96x = 628.44 × 290.32
  4. Step 4: Simplify right side
    418.96x = 182,448.70
  5. Step 5: Solve for x
    x = 182,448.70/418.96
  6. Step 6: Final answer
    x = 435.48

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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.