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Finding the Fourth Proportional to 418.78, 577.78 and 241.72

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Solution

The fourth proportional to 418.78, 577.78 and 241.72 is: 333.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    418.78 : 577.78 = 241.72 : x
  2. Step 2: Convert to fraction form
    418.78/577.78 = 241.72/x
  3. Step 3: Cross multiply
    418.78x = 577.78 × 241.72
  4. Step 4: Simplify right side
    418.78x = 139,660.98
  5. Step 5: Solve for x
    x = 139,660.98/418.78
  6. Step 6: Final answer
    x = 333.49

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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.