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Finding the Fourth Proportional to 2,169.60, 2,994 and 1,383.84

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Solution

The fourth proportional to 2,169.60, 2,994 and 1,383.84 is: 1,909.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,169.60 : 2,994 = 1,383.84 : x
  2. Step 2: Convert to fraction form
    2,169.60/2,994 = 1,383.84/x
  3. Step 3: Cross multiply
    2,169.60x = 2,994 × 1,383.84
  4. Step 4: Simplify right side
    2,169.60x = 4,143,216.96
  5. Step 5: Solve for x
    x = 4,143,216.96/2,169.60
  6. Step 6: Final answer
    x = 1,909.67

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.