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Finding the Fourth Proportional to 3,190.37, 4,785.56 and 969.21

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Solution

The fourth proportional to 3,190.37, 4,785.56 and 969.21 is: 1,453.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,190.37 : 4,785.56 = 969.21 : x
  2. Step 2: Convert to fraction form
    3,190.37/4,785.56 = 969.21/x
  3. Step 3: Cross multiply
    3,190.37x = 4,785.56 × 969.21
  4. Step 4: Simplify right side
    3,190.37x = 4,638,207.76
  5. Step 5: Solve for x
    x = 4,638,207.76/3,190.37
  6. Step 6: Final answer
    x = 1,453.82

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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.