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Finding the Fourth Proportional to 3,992.75, 5,990.09 and 1,256.75

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Solution

The fourth proportional to 3,992.75, 5,990.09 and 1,256.75 is: 1,885.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,992.75 : 5,990.09 = 1,256.75 : x
  2. Step 2: Convert to fraction form
    3,992.75/5,990.09 = 1,256.75/x
  3. Step 3: Cross multiply
    3,992.75x = 5,990.09 × 1,256.75
  4. Step 4: Simplify right side
    3,992.75x = 7,528,045.61
  5. Step 5: Solve for x
    x = 7,528,045.61/3,992.75
  6. Step 6: Final answer
    x = 1,885.43

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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.