Home / 5,279.42-7,285.69-2,889.60

Finding the Fourth Proportional to 5,279.42, 7,285.69 and 2,889.60

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Solution

The fourth proportional to 5,279.42, 7,285.69 and 2,889.60 is: 3,987.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,279.42 : 7,285.69 = 2,889.60 : x
  2. Step 2: Convert to fraction form
    5,279.42/7,285.69 = 2,889.60/x
  3. Step 3: Cross multiply
    5,279.42x = 7,285.69 × 2,889.60
  4. Step 4: Simplify right side
    5,279.42x = 21,052,722.60
  5. Step 5: Solve for x
    x = 21,052,722.60/5,279.42
  6. Step 6: Final answer
    x = 3,987.70

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.