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Finding the Fourth Proportional to 348.32, 480.42 and 231.68

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Solution

The fourth proportional to 348.32, 480.42 and 231.68 is: 319.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    348.32 : 480.42 = 231.68 : x
  2. Step 2: Convert to fraction form
    348.32/480.42 = 231.68/x
  3. Step 3: Cross multiply
    348.32x = 480.42 × 231.68
  4. Step 4: Simplify right side
    348.32x = 111,303.71
  5. Step 5: Solve for x
    x = 111,303.71/348.32
  6. Step 6: Final answer
    x = 319.54

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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.