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Finding the Fourth Proportional to 204.40, 305.91 and 123.30

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Solution

The fourth proportional to 204.40, 305.91 and 123.30 is: 184.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    204.40 : 305.91 = 123.30 : x
  2. Step 2: Convert to fraction form
    204.40/305.91 = 123.30/x
  3. Step 3: Cross multiply
    204.40x = 305.91 × 123.30
  4. Step 4: Simplify right side
    204.40x = 37,718.70
  5. Step 5: Solve for x
    x = 37,718.70/204.40
  6. Step 6: Final answer
    x = 184.54

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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.