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Finding the Fourth Proportional to 3,255.80, 4,890.90 and 3,133.40

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Solution

The fourth proportional to 3,255.80, 4,890.90 and 3,133.40 is: 4,707.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,255.80 : 4,890.90 = 3,133.40 : x
  2. Step 2: Convert to fraction form
    3,255.80/4,890.90 = 3,133.40/x
  3. Step 3: Cross multiply
    3,255.80x = 4,890.90 × 3,133.40
  4. Step 4: Simplify right side
    3,255.80x = 15,325,146.06
  5. Step 5: Solve for x
    x = 15,325,146.06/3,255.80
  6. Step 6: Final answer
    x = 4,707.03

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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.