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Finding the Fourth Proportional to 757.70, 1,135.33 and 684.80

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Solution

The fourth proportional to 757.70, 1,135.33 and 684.80 is: 1,026.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    757.70 : 1,135.33 = 684.80 : x
  2. Step 2: Convert to fraction form
    757.70/1,135.33 = 684.80/x
  3. Step 3: Cross multiply
    757.70x = 1,135.33 × 684.80
  4. Step 4: Simplify right side
    757.70x = 777,466.60
  5. Step 5: Solve for x
    x = 777,466.60/757.70
  6. Step 6: Final answer
    x = 1,026.09

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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.