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Finding the Fourth Proportional to 2,647.68, 3,971.22 and 673.30

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Solution

The fourth proportional to 2,647.68, 3,971.22 and 673.30 is: 1,009.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,647.68 : 3,971.22 = 673.30 : x
  2. Step 2: Convert to fraction form
    2,647.68/3,971.22 = 673.30/x
  3. Step 3: Cross multiply
    2,647.68x = 3,971.22 × 673.30
  4. Step 4: Simplify right side
    2,647.68x = 2,673,822.43
  5. Step 5: Solve for x
    x = 2,673,822.43/2,647.68
  6. Step 6: Final answer
    x = 1,009.87

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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.