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Finding the Fourth Proportional to 3,157.20, 4,736.10 and 965.70

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Solution

The fourth proportional to 3,157.20, 4,736.10 and 965.70 is: 1,448.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,157.20 : 4,736.10 = 965.70 : x
  2. Step 2: Convert to fraction form
    3,157.20/4,736.10 = 965.70/x
  3. Step 3: Cross multiply
    3,157.20x = 4,736.10 × 965.70
  4. Step 4: Simplify right side
    3,157.20x = 4,573,651.77
  5. Step 5: Solve for x
    x = 4,573,651.77/3,157.20
  6. Step 6: Final answer
    x = 1,448.64

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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.