Home / 2,611.24-3,898.51-1,991.64

Finding the Fourth Proportional to 2,611.24, 3,898.51 and 1,991.64

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Solution

The fourth proportional to 2,611.24, 3,898.51 and 1,991.64 is: 2,973.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,611.24 : 3,898.51 = 1,991.64 : x
  2. Step 2: Convert to fraction form
    2,611.24/3,898.51 = 1,991.64/x
  3. Step 3: Cross multiply
    2,611.24x = 3,898.51 × 1,991.64
  4. Step 4: Simplify right side
    2,611.24x = 7,764,428.46
  5. Step 5: Solve for x
    x = 7,764,428.46/2,611.24
  6. Step 6: Final answer
    x = 2,973.46

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.