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Finding the Fourth Proportional to 323.17, 484.69 and 128.11

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Solution

The fourth proportional to 323.17, 484.69 and 128.11 is: 192.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    323.17 : 484.69 = 128.11 : x
  2. Step 2: Convert to fraction form
    323.17/484.69 = 128.11/x
  3. Step 3: Cross multiply
    323.17x = 484.69 × 128.11
  4. Step 4: Simplify right side
    323.17x = 62,093.64
  5. Step 5: Solve for x
    x = 62,093.64/323.17
  6. Step 6: Final answer
    x = 192.14

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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.