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Finding the Fourth Proportional to 2,611.77, 3,919.11 and 968.64

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Solution

The fourth proportional to 2,611.77, 3,919.11 and 968.64 is: 1,453.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,611.77 : 3,919.11 = 968.64 : x
  2. Step 2: Convert to fraction form
    2,611.77/3,919.11 = 968.64/x
  3. Step 3: Cross multiply
    2,611.77x = 3,919.11 × 968.64
  4. Step 4: Simplify right side
    2,611.77x = 3,796,206.71
  5. Step 5: Solve for x
    x = 3,796,206.71/2,611.77
  6. Step 6: Final answer
    x = 1,453.50

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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.