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Finding the Fourth Proportional to 5,279.94, 7,912.91 and 2,809.44

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Solution

The fourth proportional to 5,279.94, 7,912.91 and 2,809.44 is: 4,210.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,279.94 : 7,912.91 = 2,809.44 : x
  2. Step 2: Convert to fraction form
    5,279.94/7,912.91 = 2,809.44/x
  3. Step 3: Cross multiply
    5,279.94x = 7,912.91 × 2,809.44
  4. Step 4: Simplify right side
    5,279.94x = 22,230,852.89
  5. Step 5: Solve for x
    x = 22,230,852.89/5,279.94
  6. Step 6: Final answer
    x = 4,210.44

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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.