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Finding the Fourth Proportional to 3,992.64, 5,988.98 and 1,393.75

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Solution

The fourth proportional to 3,992.64, 5,988.98 and 1,393.75 is: 2,090.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,992.64 : 5,988.98 = 1,393.75 : x
  2. Step 2: Convert to fraction form
    3,992.64/5,988.98 = 1,393.75/x
  3. Step 3: Cross multiply
    3,992.64x = 5,988.98 × 1,393.75
  4. Step 4: Simplify right side
    3,992.64x = 8,347,140.88
  5. Step 5: Solve for x
    x = 8,347,140.88/3,992.64
  6. Step 6: Final answer
    x = 2,090.63

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Double scale
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Similar ratio
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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.