Home / 3,219.77-4,828.43-1,139.40

Finding the Fourth Proportional to 3,219.77, 4,828.43 and 1,139.40

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Solution

The fourth proportional to 3,219.77, 4,828.43 and 1,139.40 is: 1,708.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,219.77 : 4,828.43 = 1,139.40 : x
  2. Step 2: Convert to fraction form
    3,219.77/4,828.43 = 1,139.40/x
  3. Step 3: Cross multiply
    3,219.77x = 4,828.43 × 1,139.40
  4. Step 4: Simplify right side
    3,219.77x = 5,501,515.99
  5. Step 5: Solve for x
    x = 5,501,515.99/3,219.77
  6. Step 6: Final answer
    x = 1,708.67

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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.