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Finding the Fourth Proportional to 418.20, 577.34 and 252.45

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Solution

The fourth proportional to 418.20, 577.34 and 252.45 is: 348.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    418.20 : 577.34 = 252.45 : x
  2. Step 2: Convert to fraction form
    418.20/577.34 = 252.45/x
  3. Step 3: Cross multiply
    418.20x = 577.34 × 252.45
  4. Step 4: Simplify right side
    418.20x = 145,749.48
  5. Step 5: Solve for x
    x = 145,749.48/418.20
  6. Step 6: Final answer
    x = 348.52

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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.