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Finding the Fourth Proportional to 339.72, 468.84 and 261.44

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Solution

The fourth proportional to 339.72, 468.84 and 261.44 is: 360.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    339.72 : 468.84 = 261.44 : x
  2. Step 2: Convert to fraction form
    339.72/468.84 = 261.44/x
  3. Step 3: Cross multiply
    339.72x = 468.84 × 261.44
  4. Step 4: Simplify right side
    339.72x = 122,573.53
  5. Step 5: Solve for x
    x = 122,573.53/339.72
  6. Step 6: Final answer
    x = 360.81

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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.