Home / 2,140.32-3,211.44-986.40

Finding the Fourth Proportional to 2,140.32, 3,211.44 and 986.40

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Solution

The fourth proportional to 2,140.32, 3,211.44 and 986.40 is: 1,480.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,140.32 : 3,211.44 = 986.40 : x
  2. Step 2: Convert to fraction form
    2,140.32/3,211.44 = 986.40/x
  3. Step 3: Cross multiply
    2,140.32x = 3,211.44 × 986.40
  4. Step 4: Simplify right side
    2,140.32x = 3,167,764.42
  5. Step 5: Solve for x
    x = 3,167,764.42/2,140.32
  6. Step 6: Final answer
    x = 1,480.04

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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.