Home / 3,611.40-4,986.18-2,905.80

Finding the Fourth Proportional to 3,611.40, 4,986.18 and 2,905.80

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Solution

The fourth proportional to 3,611.40, 4,986.18 and 2,905.80 is: 4,011.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,611.40 : 4,986.18 = 2,905.80 : x
  2. Step 2: Convert to fraction form
    3,611.40/4,986.18 = 2,905.80/x
  3. Step 3: Cross multiply
    3,611.40x = 4,986.18 × 2,905.80
  4. Step 4: Simplify right side
    3,611.40x = 14,488,841.84
  5. Step 5: Solve for x
    x = 14,488,841.84/3,611.40
  6. Step 6: Final answer
    x = 4,011.97

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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.