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Finding the Fourth Proportional to 3,156.21, 4,735.04 and 964.80

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Solution

The fourth proportional to 3,156.21, 4,735.04 and 964.80 is: 1,447.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,156.21 : 4,735.04 = 964.80 : x
  2. Step 2: Convert to fraction form
    3,156.21/4,735.04 = 964.80/x
  3. Step 3: Cross multiply
    3,156.21x = 4,735.04 × 964.80
  4. Step 4: Simplify right side
    3,156.21x = 4,568,361.77
  5. Step 5: Solve for x
    x = 4,568,361.77/3,156.21
  6. Step 6: Final answer
    x = 1,447.42

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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.