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Finding the Fourth Proportional to 329.23, 491.43 and 286.20

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Solution

The fourth proportional to 329.23, 491.43 and 286.20 is: 427.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    329.23 : 491.43 = 286.20 : x
  2. Step 2: Convert to fraction form
    329.23/491.43 = 286.20/x
  3. Step 3: Cross multiply
    329.23x = 491.43 × 286.20
  4. Step 4: Simplify right side
    329.23x = 140,647.27
  5. Step 5: Solve for x
    x = 140,647.27/329.23
  6. Step 6: Final answer
    x = 427.20

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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.