Home / 2,718.72-4,078.08-2,145.60

Finding the Fourth Proportional to 2,718.72, 4,078.08 and 2,145.60

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Solution

The fourth proportional to 2,718.72, 4,078.08 and 2,145.60 is: 3,218.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,718.72 : 4,078.08 = 2,145.60 : x
  2. Step 2: Convert to fraction form
    2,718.72/4,078.08 = 2,145.60/x
  3. Step 3: Cross multiply
    2,718.72x = 4,078.08 × 2,145.60
  4. Step 4: Simplify right side
    2,718.72x = 8,749,928.45
  5. Step 5: Solve for x
    x = 8,749,928.45/2,718.72
  6. Step 6: Final answer
    x = 3,218.40

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1.5x scale

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.