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Finding the Fourth Proportional to 1,200.91, 1,801.36 and 323.41

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Solution

The fourth proportional to 1,200.91, 1,801.36 and 323.41 is: 485.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,200.91 : 1,801.36 = 323.41 : x
  2. Step 2: Convert to fraction form
    1,200.91/1,801.36 = 323.41/x
  3. Step 3: Cross multiply
    1,200.91x = 1,801.36 × 323.41
  4. Step 4: Simplify right side
    1,200.91x = 582,572.53
  5. Step 5: Solve for x
    x = 582,572.53/1,200.91
  6. Step 6: Final answer
    x = 485.11

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.