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Finding the Fourth Proportional to 418.42, 577.41 and 252.55

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Solution

The fourth proportional to 418.42, 577.41 and 252.55 is: 348.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    418.42 : 577.41 = 252.55 : x
  2. Step 2: Convert to fraction form
    418.42/577.41 = 252.55/x
  3. Step 3: Cross multiply
    418.42x = 577.41 × 252.55
  4. Step 4: Simplify right side
    418.42x = 145,824.90
  5. Step 5: Solve for x
    x = 145,824.90/418.42
  6. Step 6: Final answer
    x = 348.51

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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.