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Finding the Fourth Proportional to 3,611.80, 4,984.59 and 2,039.86

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Solution

The fourth proportional to 3,611.80, 4,984.59 and 2,039.86 is: 2,815.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,611.80 : 4,984.59 = 2,039.86 : x
  2. Step 2: Convert to fraction form
    3,611.80/4,984.59 = 2,039.86/x
  3. Step 3: Cross multiply
    3,611.80x = 4,984.59 × 2,039.86
  4. Step 4: Simplify right side
    3,611.80x = 10,167,865.76
  5. Step 5: Solve for x
    x = 10,167,865.76/3,611.80
  6. Step 6: Final answer
    x = 2,815.18

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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.