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Finding the Fourth Proportional to 3,047.96, 4,205.72 and 1,721.64

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Solution

The fourth proportional to 3,047.96, 4,205.72 and 1,721.64 is: 2,375.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,047.96 : 4,205.72 = 1,721.64 : x
  2. Step 2: Convert to fraction form
    3,047.96/4,205.72 = 1,721.64/x
  3. Step 3: Cross multiply
    3,047.96x = 4,205.72 × 1,721.64
  4. Step 4: Simplify right side
    3,047.96x = 7,240,735.78
  5. Step 5: Solve for x
    x = 7,240,735.78/3,047.96
  6. Step 6: Final answer
    x = 2,375.60

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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.