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Finding the Fourth Proportional to 353.02, 486.97 and 287.41

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Solution

The fourth proportional to 353.02, 486.97 and 287.41 is: 396.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    353.02 : 486.97 = 287.41 : x
  2. Step 2: Convert to fraction form
    353.02/486.97 = 287.41/x
  3. Step 3: Cross multiply
    353.02x = 486.97 × 287.41
  4. Step 4: Simplify right side
    353.02x = 139,960.05
  5. Step 5: Solve for x
    x = 139,960.05/353.02
  6. Step 6: Final answer
    x = 396.46

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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.