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Finding the Fourth Proportional to 3,163.70, 4,745.55 and 823.70

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Solution

The fourth proportional to 3,163.70, 4,745.55 and 823.70 is: 1,235.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,163.70 : 4,745.55 = 823.70 : x
  2. Step 2: Convert to fraction form
    3,163.70/4,745.55 = 823.70/x
  3. Step 3: Cross multiply
    3,163.70x = 4,745.55 × 823.70
  4. Step 4: Simplify right side
    3,163.70x = 3,908,909.54
  5. Step 5: Solve for x
    x = 3,908,909.54/3,163.70
  6. Step 6: Final answer
    x = 1,235.55

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1.5x scale

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.