Home / 3,118.38-4,676.78-926.60

Finding the Fourth Proportional to 3,118.38, 4,676.78 and 926.60

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Solution

The fourth proportional to 3,118.38, 4,676.78 and 926.60 is: 1,389.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,118.38 : 4,676.78 = 926.60 : x
  2. Step 2: Convert to fraction form
    3,118.38/4,676.78 = 926.60/x
  3. Step 3: Cross multiply
    3,118.38x = 4,676.78 × 926.60
  4. Step 4: Simplify right side
    3,118.38x = 4,333,504.35
  5. Step 5: Solve for x
    x = 4,333,504.35/3,118.38
  6. Step 6: Final answer
    x = 1,389.67

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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.