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Finding the Fourth Proportional to 328, 452.76 and 286.60

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Solution

The fourth proportional to 328, 452.76 and 286.60 is: 395.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    328 : 452.76 = 286.60 : x
  2. Step 2: Convert to fraction form
    328/452.76 = 286.60/x
  3. Step 3: Cross multiply
    328x = 452.76 × 286.60
  4. Step 4: Simplify right side
    328x = 129,761.02
  5. Step 5: Solve for x
    x = 129,761.02/328
  6. Step 6: Final answer
    x = 395.61

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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.