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Finding the Fourth Proportional to 309.31, 426.91 and 204.41

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Solution

The fourth proportional to 309.31, 426.91 and 204.41 is: 282.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    309.31 : 426.91 = 204.41 : x
  2. Step 2: Convert to fraction form
    309.31/426.91 = 204.41/x
  3. Step 3: Cross multiply
    309.31x = 426.91 × 204.41
  4. Step 4: Simplify right side
    309.31x = 87,266.19
  5. Step 5: Solve for x
    x = 87,266.19/309.31
  6. Step 6: Final answer
    x = 282.13

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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.