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Finding the Fourth Proportional to 3,091.90, 4,266.90 and 1,765.73

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Solution

The fourth proportional to 3,091.90, 4,266.90 and 1,765.73 is: 2,436.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,091.90 : 4,266.90 = 1,765.73 : x
  2. Step 2: Convert to fraction form
    3,091.90/4,266.90 = 1,765.73/x
  3. Step 3: Cross multiply
    3,091.90x = 4,266.90 × 1,765.73
  4. Step 4: Simplify right side
    3,091.90x = 7,534,193.34
  5. Step 5: Solve for x
    x = 7,534,193.34/3,091.90
  6. Step 6: Final answer
    x = 2,436.75

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1.5x scale

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.