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Finding the Fourth Proportional to 3,571.74, 4,928.16 and 2,078.76

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Solution

The fourth proportional to 3,571.74, 4,928.16 and 2,078.76 is: 2,868.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,571.74 : 4,928.16 = 2,078.76 : x
  2. Step 2: Convert to fraction form
    3,571.74/4,928.16 = 2,078.76/x
  3. Step 3: Cross multiply
    3,571.74x = 4,928.16 × 2,078.76
  4. Step 4: Simplify right side
    3,571.74x = 10,244,461.88
  5. Step 5: Solve for x
    x = 10,244,461.88/3,571.74
  6. Step 6: Final answer
    x = 2,868.20

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1.5x scale

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.