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Finding the Fourth Proportional to 3,937.60, 5,979.32 and 3,937.60

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Solution

The fourth proportional to 3,937.60, 5,979.32 and 3,937.60 is: 5,979.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,937.60 : 5,979.32 = 3,937.60 : x
  2. Step 2: Convert to fraction form
    3,937.60/5,979.32 = 3,937.60/x
  3. Step 3: Cross multiply
    3,937.60x = 5,979.32 × 3,937.60
  4. Step 4: Simplify right side
    3,937.60x = 23,544,170.43
  5. Step 5: Solve for x
    x = 23,544,170.43/3,937.60
  6. Step 6: Final answer
    x = 5,979.32

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.52) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.