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Finding the Fourth Proportional to 603.78, 905.85 and 192.98

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Solution

The fourth proportional to 603.78, 905.85 and 192.98 is: 289.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    603.78 : 905.85 = 192.98 : x
  2. Step 2: Convert to fraction form
    603.78/905.85 = 192.98/x
  3. Step 3: Cross multiply
    603.78x = 905.85 × 192.98
  4. Step 4: Simplify right side
    603.78x = 174,806.40
  5. Step 5: Solve for x
    x = 174,806.40/603.78
  6. Step 6: Final answer
    x = 289.52

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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.