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Finding the Fourth Proportional to 939.89, 1,292.62 and 751.26

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Solution

The fourth proportional to 939.89, 1,292.62 and 751.26 is: 1,033.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    939.89 : 1,292.62 = 751.26 : x
  2. Step 2: Convert to fraction form
    939.89/1,292.62 = 751.26/x
  3. Step 3: Cross multiply
    939.89x = 1,292.62 × 751.26
  4. Step 4: Simplify right side
    939.89x = 971,093.70
  5. Step 5: Solve for x
    x = 971,093.70/939.89
  6. Step 6: Final answer
    x = 1,033.20

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.