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Finding the Fourth Proportional to 386.88, 580.05 and 232.89

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Solution

The fourth proportional to 386.88, 580.05 and 232.89 is: 349.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    386.88 : 580.05 = 232.89 : x
  2. Step 2: Convert to fraction form
    386.88/580.05 = 232.89/x
  3. Step 3: Cross multiply
    386.88x = 580.05 × 232.89
  4. Step 4: Simplify right side
    386.88x = 135,087.84
  5. Step 5: Solve for x
    x = 135,087.84/386.88
  6. Step 6: Final answer
    x = 349.17

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.