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Finding the Fourth Proportional to 328.17, 452.75 and 286.73

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Solution

The fourth proportional to 328.17, 452.75 and 286.73 is: 395.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    328.17 : 452.75 = 286.73 : x
  2. Step 2: Convert to fraction form
    328.17/452.75 = 286.73/x
  3. Step 3: Cross multiply
    328.17x = 452.75 × 286.73
  4. Step 4: Simplify right side
    328.17x = 129,817.01
  5. Step 5: Solve for x
    x = 129,817.01/328.17
  6. Step 6: Final answer
    x = 395.58

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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.