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Finding the Fourth Proportional to 1,769.12, 2,653.78 and 673.64

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Solution

The fourth proportional to 1,769.12, 2,653.78 and 673.64 is: 1,010.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,769.12 : 2,653.78 = 673.64 : x
  2. Step 2: Convert to fraction form
    1,769.12/2,653.78 = 673.64/x
  3. Step 3: Cross multiply
    1,769.12x = 2,653.78 × 673.64
  4. Step 4: Simplify right side
    1,769.12x = 1,787,692.36
  5. Step 5: Solve for x
    x = 1,787,692.36/1,769.12
  6. Step 6: Final answer
    x = 1,010.50

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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.