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Finding the Fourth Proportional to 1,090.75, 1,634.73 and 505.75

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Solution

The fourth proportional to 1,090.75, 1,634.73 and 505.75 is: 757.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,090.75 : 1,634.73 = 505.75 : x
  2. Step 2: Convert to fraction form
    1,090.75/1,634.73 = 505.75/x
  3. Step 3: Cross multiply
    1,090.75x = 1,634.73 × 505.75
  4. Step 4: Simplify right side
    1,090.75x = 826,764.70
  5. Step 5: Solve for x
    x = 826,764.70/1,090.75
  6. Step 6: Final answer
    x = 757.98

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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.