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Finding the Fourth Proportional to 342.44, 472.74 and 238.76

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Solution

The fourth proportional to 342.44, 472.74 and 238.76 is: 329.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    342.44 : 472.74 = 238.76 : x
  2. Step 2: Convert to fraction form
    342.44/472.74 = 238.76/x
  3. Step 3: Cross multiply
    342.44x = 472.74 × 238.76
  4. Step 4: Simplify right side
    342.44x = 112,871.40
  5. Step 5: Solve for x
    x = 112,871.40/342.44
  6. Step 6: Final answer
    x = 329.61

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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.