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Finding the Fourth Proportional to 2,069.40, 3,104.10 and 770.57

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Solution

The fourth proportional to 2,069.40, 3,104.10 and 770.57 is: 1,155.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,069.40 : 3,104.10 = 770.57 : x
  2. Step 2: Convert to fraction form
    2,069.40/3,104.10 = 770.57/x
  3. Step 3: Cross multiply
    2,069.40x = 3,104.10 × 770.57
  4. Step 4: Simplify right side
    2,069.40x = 2,391,906.96
  5. Step 5: Solve for x
    x = 2,391,906.96/2,069.40
  6. Step 6: Final answer
    x = 1,155.85

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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.