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Finding the Fourth Proportional to 2,256.75, 3,385.51 and 775.90

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Solution

The fourth proportional to 2,256.75, 3,385.51 and 775.90 is: 1,163.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,256.75 : 3,385.51 = 775.90 : x
  2. Step 2: Convert to fraction form
    2,256.75/3,385.51 = 775.90/x
  3. Step 3: Cross multiply
    2,256.75x = 3,385.51 × 775.90
  4. Step 4: Simplify right side
    2,256.75x = 2,626,813.33
  5. Step 5: Solve for x
    x = 2,626,813.33/2,256.75
  6. Step 6: Final answer
    x = 1,163.98

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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.