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Finding the Fourth Proportional to 1,997.90, 2,992.70 and 1,688.67

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Solution

The fourth proportional to 1,997.90, 2,992.70 and 1,688.67 is: 2,529.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,997.90 : 2,992.70 = 1,688.67 : x
  2. Step 2: Convert to fraction form
    1,997.90/2,992.70 = 1,688.67/x
  3. Step 3: Cross multiply
    1,997.90x = 2,992.70 × 1,688.67
  4. Step 4: Simplify right side
    1,997.90x = 5,053,676.38
  5. Step 5: Solve for x
    x = 5,053,676.38/1,997.90
  6. Step 6: Final answer
    x = 2,529.50

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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.