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Finding the Fourth Proportional to 769.31, 1,153.94 and 192.18

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Solution

The fourth proportional to 769.31, 1,153.94 and 192.18 is: 288.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    769.31 : 1,153.94 = 192.18 : x
  2. Step 2: Convert to fraction form
    769.31/1,153.94 = 192.18/x
  3. Step 3: Cross multiply
    769.31x = 1,153.94 × 192.18
  4. Step 4: Simplify right side
    769.31x = 221,764.19
  5. Step 5: Solve for x
    x = 221,764.19/769.31
  6. Step 6: Final answer
    x = 288.26

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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.