Home / 2,660.95-3,986.56-1,928.71

Finding the Fourth Proportional to 2,660.95, 3,986.56 and 1,928.71

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Solution

The fourth proportional to 2,660.95, 3,986.56 and 1,928.71 is: 2,889.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,660.95 : 3,986.56 = 1,928.71 : x
  2. Step 2: Convert to fraction form
    2,660.95/3,986.56 = 1,928.71/x
  3. Step 3: Cross multiply
    2,660.95x = 3,986.56 × 1,928.71
  4. Step 4: Simplify right side
    2,660.95x = 7,688,918.14
  5. Step 5: Solve for x
    x = 7,688,918.14/2,660.95
  6. Step 6: Final answer
    x = 2,889.54

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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.