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Finding the Fourth Proportional to 2,891.80, 3,992.98 and 2,670.67

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Solution

The fourth proportional to 2,891.80, 3,992.98 and 2,670.67 is: 3,687.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,891.80 : 3,992.98 = 2,670.67 : x
  2. Step 2: Convert to fraction form
    2,891.80/3,992.98 = 2,670.67/x
  3. Step 3: Cross multiply
    2,891.80x = 3,992.98 × 2,670.67
  4. Step 4: Simplify right side
    2,891.80x = 10,663,911.93
  5. Step 5: Solve for x
    x = 10,663,911.93/2,891.80
  6. Step 6: Final answer
    x = 3,687.64

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.