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Finding the Fourth Proportional to 756.22, 1,133.37 and 658.31

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Solution

The fourth proportional to 756.22, 1,133.37 and 658.31 is: 986.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    756.22 : 1,133.37 = 658.31 : x
  2. Step 2: Convert to fraction form
    756.22/1,133.37 = 658.31/x
  3. Step 3: Cross multiply
    756.22x = 1,133.37 × 658.31
  4. Step 4: Simplify right side
    756.22x = 746,108.80
  5. Step 5: Solve for x
    x = 746,108.80/756.22
  6. Step 6: Final answer
    x = 986.63

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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.