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Finding the Fourth Proportional to 298.89, 412.02 and 239.79

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Solution

The fourth proportional to 298.89, 412.02 and 239.79 is: 330.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    298.89 : 412.02 = 239.79 : x
  2. Step 2: Convert to fraction form
    298.89/412.02 = 239.79/x
  3. Step 3: Cross multiply
    298.89x = 412.02 × 239.79
  4. Step 4: Simplify right side
    298.89x = 98,799.82
  5. Step 5: Solve for x
    x = 98,799.82/298.89
  6. Step 6: Final answer
    x = 330.56

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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.