Home / 2,666.35-3,999.93-1,279.43

Finding the Fourth Proportional to 2,666.35, 3,999.93 and 1,279.43

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Solution

The fourth proportional to 2,666.35, 3,999.93 and 1,279.43 is: 1,919.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,666.35 : 3,999.93 = 1,279.43 : x
  2. Step 2: Convert to fraction form
    2,666.35/3,999.93 = 1,279.43/x
  3. Step 3: Cross multiply
    2,666.35x = 3,999.93 × 1,279.43
  4. Step 4: Simplify right side
    2,666.35x = 5,117,630.44
  5. Step 5: Solve for x
    x = 5,117,630.44/2,666.35
  6. Step 6: Final answer
    x = 1,919.34

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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.