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Finding the Fourth Proportional to 2,178.89, 3,268.58 and 792.87

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Solution

The fourth proportional to 2,178.89, 3,268.58 and 792.87 is: 1,189.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,178.89 : 3,268.58 = 792.87 : x
  2. Step 2: Convert to fraction form
    2,178.89/3,268.58 = 792.87/x
  3. Step 3: Cross multiply
    2,178.89x = 3,268.58 × 792.87
  4. Step 4: Simplify right side
    2,178.89x = 2,591,555.06
  5. Step 5: Solve for x
    x = 2,591,555.06/2,178.89
  6. Step 6: Final answer
    x = 1,189.40

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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.