Home / 4,163.78-6,245.09-1,390.39

Finding the Fourth Proportional to 4,163.78, 6,245.09 and 1,390.39

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Solution

The fourth proportional to 4,163.78, 6,245.09 and 1,390.39 is: 2,085.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,163.78 : 6,245.09 = 1,390.39 : x
  2. Step 2: Convert to fraction form
    4,163.78/6,245.09 = 1,390.39/x
  3. Step 3: Cross multiply
    4,163.78x = 6,245.09 × 1,390.39
  4. Step 4: Simplify right side
    4,163.78x = 8,683,098.55
  5. Step 5: Solve for x
    x = 8,683,098.55/4,163.78
  6. Step 6: Final answer
    x = 2,085.39

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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.