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Finding the Fourth Proportional to 754.27, 1,121.93 and 692.31

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Solution

The fourth proportional to 754.27, 1,121.93 and 692.31 is: 1,029.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    754.27 : 1,121.93 = 692.31 : x
  2. Step 2: Convert to fraction form
    754.27/1,121.93 = 692.31/x
  3. Step 3: Cross multiply
    754.27x = 1,121.93 × 692.31
  4. Step 4: Simplify right side
    754.27x = 776,723.36
  5. Step 5: Solve for x
    x = 776,723.36/754.27
  6. Step 6: Final answer
    x = 1,029.77

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.