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Finding the Fourth Proportional to 328.36, 494.76 and 271.86

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Solution

The fourth proportional to 328.36, 494.76 and 271.86 is: 409.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    328.36 : 494.76 = 271.86 : x
  2. Step 2: Convert to fraction form
    328.36/494.76 = 271.86/x
  3. Step 3: Cross multiply
    328.36x = 494.76 × 271.86
  4. Step 4: Simplify right side
    328.36x = 134,505.45
  5. Step 5: Solve for x
    x = 134,505.45/328.36
  6. Step 6: Final answer
    x = 409.63

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.