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Finding the Fourth Proportional to 1,998.90, 2,994.19 and 1,689.67

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Solution

The fourth proportional to 1,998.90, 2,994.19 and 1,689.67 is: 2,530.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,998.90 : 2,994.19 = 1,689.67 : x
  2. Step 2: Convert to fraction form
    1,998.90/2,994.19 = 1,689.67/x
  3. Step 3: Cross multiply
    1,998.90x = 2,994.19 × 1,689.67
  4. Step 4: Simplify right side
    1,998.90x = 5,059,193.02
  5. Step 5: Solve for x
    x = 5,059,193.02/1,998.90
  6. Step 6: Final answer
    x = 2,530.99

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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.