Home / 2,930.38-4,396.88-1,287.39

Finding the Fourth Proportional to 2,930.38, 4,396.88 and 1,287.39

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Solution

The fourth proportional to 2,930.38, 4,396.88 and 1,287.39 is: 1,931.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,930.38 : 4,396.88 = 1,287.39 : x
  2. Step 2: Convert to fraction form
    2,930.38/4,396.88 = 1,287.39/x
  3. Step 3: Cross multiply
    2,930.38x = 4,396.88 × 1,287.39
  4. Step 4: Simplify right side
    2,930.38x = 5,660,519.05
  5. Step 5: Solve for x
    x = 5,660,519.05/2,930.38
  6. Step 6: Final answer
    x = 1,931.67

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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.