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Finding the Fourth Proportional to 349.12, 480.40 and 323.20

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Solution

The fourth proportional to 349.12, 480.40 and 323.20 is: 444.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    349.12 : 480.40 = 323.20 : x
  2. Step 2: Convert to fraction form
    349.12/480.40 = 323.20/x
  3. Step 3: Cross multiply
    349.12x = 480.40 × 323.20
  4. Step 4: Simplify right side
    349.12x = 155,265.28
  5. Step 5: Solve for x
    x = 155,265.28/349.12
  6. Step 6: Final answer
    x = 444.73

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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.