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Finding the Fourth Proportional to 394.01, 543.80 and 261.23

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Solution

The fourth proportional to 394.01, 543.80 and 261.23 is: 360.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    394.01 : 543.80 = 261.23 : x
  2. Step 2: Convert to fraction form
    394.01/543.80 = 261.23/x
  3. Step 3: Cross multiply
    394.01x = 543.80 × 261.23
  4. Step 4: Simplify right side
    394.01x = 142,056.87
  5. Step 5: Solve for x
    x = 142,056.87/394.01
  6. Step 6: Final answer
    x = 360.54

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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.