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Finding the Fourth Proportional to 3,992.64, 5,989.68 and 1,910.88

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Solution

The fourth proportional to 3,992.64, 5,989.68 and 1,910.88 is: 2,866.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,992.64 : 5,989.68 = 1,910.88 : x
  2. Step 2: Convert to fraction form
    3,992.64/5,989.68 = 1,910.88/x
  3. Step 3: Cross multiply
    3,992.64x = 5,989.68 × 1,910.88
  4. Step 4: Simplify right side
    3,992.64x = 11,445,559.72
  5. Step 5: Solve for x
    x = 11,445,559.72/3,992.64
  6. Step 6: Final answer
    x = 2,866.66

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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.