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Finding the Fourth Proportional to 1,992.53, 2,989.31 and 693.97

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Solution

The fourth proportional to 1,992.53, 2,989.31 and 693.97 is: 1,041.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,992.53 : 2,989.31 = 693.97 : x
  2. Step 2: Convert to fraction form
    1,992.53/2,989.31 = 693.97/x
  3. Step 3: Cross multiply
    1,992.53x = 2,989.31 × 693.97
  4. Step 4: Simplify right side
    1,992.53x = 2,074,480.52
  5. Step 5: Solve for x
    x = 2,074,480.52/1,992.53
  6. Step 6: Final answer
    x = 1,041.13

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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.