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Finding the Fourth Proportional to 754.69, 1,131.73 and 292.21

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Solution

The fourth proportional to 754.69, 1,131.73 and 292.21 is: 438.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    754.69 : 1,131.73 = 292.21 : x
  2. Step 2: Convert to fraction form
    754.69/1,131.73 = 292.21/x
  3. Step 3: Cross multiply
    754.69x = 1,131.73 × 292.21
  4. Step 4: Simplify right side
    754.69x = 330,702.82
  5. Step 5: Solve for x
    x = 330,702.82/754.69
  6. Step 6: Final answer
    x = 438.20

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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.