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Finding the Fourth Proportional to 309.80, 427.30 and 232.36

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Solution

The fourth proportional to 309.80, 427.30 and 232.36 is: 320.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    309.80 : 427.30 = 232.36 : x
  2. Step 2: Convert to fraction form
    309.80/427.30 = 232.36/x
  3. Step 3: Cross multiply
    309.80x = 427.30 × 232.36
  4. Step 4: Simplify right side
    309.80x = 99,287.43
  5. Step 5: Solve for x
    x = 99,287.43/309.80
  6. Step 6: Final answer
    x = 320.49

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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.