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Finding the Fourth Proportional to 1,992.09, 2,988.27 and 693.12

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Solution

The fourth proportional to 1,992.09, 2,988.27 and 693.12 is: 1,039.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,992.09 : 2,988.27 = 693.12 : x
  2. Step 2: Convert to fraction form
    1,992.09/2,988.27 = 693.12/x
  3. Step 3: Cross multiply
    1,992.09x = 2,988.27 × 693.12
  4. Step 4: Simplify right side
    1,992.09x = 2,071,229.70
  5. Step 5: Solve for x
    x = 2,071,229.70/1,992.09
  6. Step 6: Final answer
    x = 1,039.73

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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.