Home / 2,784.40-4,173-1,321.54

Finding the Fourth Proportional to 2,784.40, 4,173 and 1,321.54

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Solution

The fourth proportional to 2,784.40, 4,173 and 1,321.54 is: 1,980.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,784.40 : 4,173 = 1,321.54 : x
  2. Step 2: Convert to fraction form
    2,784.40/4,173 = 1,321.54/x
  3. Step 3: Cross multiply
    2,784.40x = 4,173 × 1,321.54
  4. Step 4: Simplify right side
    2,784.40x = 5,514,786.42
  5. Step 5: Solve for x
    x = 5,514,786.42/2,784.40
  6. Step 6: Final answer
    x = 1,980.60

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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.