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Finding the Fourth Proportional to 3,189.28, 4,784.32 and 997.60

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Solution

The fourth proportional to 3,189.28, 4,784.32 and 997.60 is: 1,496.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,189.28 : 4,784.32 = 997.60 : x
  2. Step 2: Convert to fraction form
    3,189.28/4,784.32 = 997.60/x
  3. Step 3: Cross multiply
    3,189.28x = 4,784.32 × 997.60
  4. Step 4: Simplify right side
    3,189.28x = 4,772,837.63
  5. Step 5: Solve for x
    x = 4,772,837.63/3,189.28
  6. Step 6: Final answer
    x = 1,496.53

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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.