Home / 1,960.39-2,702.32-1,399.87

Finding the Fourth Proportional to 1,960.39, 2,702.32 and 1,399.87

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Solution

The fourth proportional to 1,960.39, 2,702.32 and 1,399.87 is: 1,929.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,960.39 : 2,702.32 = 1,399.87 : x
  2. Step 2: Convert to fraction form
    1,960.39/2,702.32 = 1,399.87/x
  3. Step 3: Cross multiply
    1,960.39x = 2,702.32 × 1,399.87
  4. Step 4: Simplify right side
    1,960.39x = 3,782,896.70
  5. Step 5: Solve for x
    x = 3,782,896.70/1,960.39
  6. Step 6: Final answer
    x = 1,929.67

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.