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Finding the Fourth Proportional to 604.89, 906.78 and 239.40

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Solution

The fourth proportional to 604.89, 906.78 and 239.40 is: 358.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    604.89 : 906.78 = 239.40 : x
  2. Step 2: Convert to fraction form
    604.89/906.78 = 239.40/x
  3. Step 3: Cross multiply
    604.89x = 906.78 × 239.40
  4. Step 4: Simplify right side
    604.89x = 217,083.13
  5. Step 5: Solve for x
    x = 217,083.13/604.89
  6. Step 6: Final answer
    x = 358.88

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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.