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Finding the Fourth Proportional to 667.08, 919.97 and 418.43

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Solution

The fourth proportional to 667.08, 919.97 and 418.43 is: 577.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    667.08 : 919.97 = 418.43 : x
  2. Step 2: Convert to fraction form
    667.08/919.97 = 418.43/x
  3. Step 3: Cross multiply
    667.08x = 919.97 × 418.43
  4. Step 4: Simplify right side
    667.08x = 384,943.05
  5. Step 5: Solve for x
    x = 384,943.05/667.08
  6. Step 6: Final answer
    x = 577.06

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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.