Home / 2,146.08-3,218.87-685.34

Finding the Fourth Proportional to 2,146.08, 3,218.87 and 685.34

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Solution

The fourth proportional to 2,146.08, 3,218.87 and 685.34 is: 1,027.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,146.08 : 3,218.87 = 685.34 : x
  2. Step 2: Convert to fraction form
    2,146.08/3,218.87 = 685.34/x
  3. Step 3: Cross multiply
    2,146.08x = 3,218.87 × 685.34
  4. Step 4: Simplify right side
    2,146.08x = 2,206,000.84
  5. Step 5: Solve for x
    x = 2,206,000.84/2,146.08
  6. Step 6: Final answer
    x = 1,027.92

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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.