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Finding the Fourth Proportional to 1,769.72, 2,652.75 and 673.79

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Solution

The fourth proportional to 1,769.72, 2,652.75 and 673.79 is: 1,009.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,769.72 : 2,652.75 = 673.79 : x
  2. Step 2: Convert to fraction form
    1,769.72/2,652.75 = 673.79/x
  3. Step 3: Cross multiply
    1,769.72x = 2,652.75 × 673.79
  4. Step 4: Simplify right side
    1,769.72x = 1,787,383.16
  5. Step 5: Solve for x
    x = 1,787,383.16/1,769.72
  6. Step 6: Final answer
    x = 1,009.98

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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.