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Finding the Fourth Proportional to 604.75, 906.45 and 257.98

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Solution

The fourth proportional to 604.75, 906.45 and 257.98 is: 386.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    604.75 : 906.45 = 257.98 : x
  2. Step 2: Convert to fraction form
    604.75/906.45 = 257.98/x
  3. Step 3: Cross multiply
    604.75x = 906.45 × 257.98
  4. Step 4: Simplify right side
    604.75x = 233,845.97
  5. Step 5: Solve for x
    x = 233,845.97/604.75
  6. Step 6: Final answer
    x = 386.68

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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.