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Finding the Fourth Proportional to 2,125.97, 3,185.69 and 892.70

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Solution

The fourth proportional to 2,125.97, 3,185.69 and 892.70 is: 1,337.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,125.97 : 3,185.69 = 892.70 : x
  2. Step 2: Convert to fraction form
    2,125.97/3,185.69 = 892.70/x
  3. Step 3: Cross multiply
    2,125.97x = 3,185.69 × 892.70
  4. Step 4: Simplify right side
    2,125.97x = 2,843,845.07
  5. Step 5: Solve for x
    x = 2,843,845.07/2,125.97
  6. Step 6: Final answer
    x = 1,337.67

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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.