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Finding the Fourth Proportional to 418.86, 627.26 and 245.09

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Solution

The fourth proportional to 418.86, 627.26 and 245.09 is: 367.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    418.86 : 627.26 = 245.09 : x
  2. Step 2: Convert to fraction form
    418.86/627.26 = 245.09/x
  3. Step 3: Cross multiply
    418.86x = 627.26 × 245.09
  4. Step 4: Simplify right side
    418.86x = 153,735.50
  5. Step 5: Solve for x
    x = 153,735.50/418.86
  6. Step 6: Final answer
    x = 367.03

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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.