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Finding the Fourth Proportional to 328.69, 491.31 and 250.84

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Solution

The fourth proportional to 328.69, 491.31 and 250.84 is: 374.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    328.69 : 491.31 = 250.84 : x
  2. Step 2: Convert to fraction form
    328.69/491.31 = 250.84/x
  3. Step 3: Cross multiply
    328.69x = 491.31 × 250.84
  4. Step 4: Simplify right side
    328.69x = 123,240.66
  5. Step 5: Solve for x
    x = 123,240.66/328.69
  6. Step 6: Final answer
    x = 374.94

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.