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Finding the Fourth Proportional to 3,267.80, 4,908.90 and 3,145.40

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Solution

The fourth proportional to 3,267.80, 4,908.90 and 3,145.40 is: 4,725.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,267.80 : 4,908.90 = 3,145.40 : x
  2. Step 2: Convert to fraction form
    3,267.80/4,908.90 = 3,145.40/x
  3. Step 3: Cross multiply
    3,267.80x = 4,908.90 × 3,145.40
  4. Step 4: Simplify right side
    3,267.80x = 15,440,454.06
  5. Step 5: Solve for x
    x = 15,440,454.06/3,267.80
  6. Step 6: Final answer
    x = 4,725.03

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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.