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Finding the Fourth Proportional to 2,722.57, 4,083.86 and 670.57

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Solution

The fourth proportional to 2,722.57, 4,083.86 and 670.57 is: 1,005.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,722.57 : 4,083.86 = 670.57 : x
  2. Step 2: Convert to fraction form
    2,722.57/4,083.86 = 670.57/x
  3. Step 3: Cross multiply
    2,722.57x = 4,083.86 × 670.57
  4. Step 4: Simplify right side
    2,722.57x = 2,738,514.00
  5. Step 5: Solve for x
    x = 2,738,514.00/2,722.57
  6. Step 6: Final answer
    x = 1,005.86

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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.