Home / 3,086.79-4,259.87-1,689.54

Finding the Fourth Proportional to 3,086.79, 4,259.87 and 1,689.54

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Solution

The fourth proportional to 3,086.79, 4,259.87 and 1,689.54 is: 2,331.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,086.79 : 4,259.87 = 1,689.54 : x
  2. Step 2: Convert to fraction form
    3,086.79/4,259.87 = 1,689.54/x
  3. Step 3: Cross multiply
    3,086.79x = 4,259.87 × 1,689.54
  4. Step 4: Simplify right side
    3,086.79x = 7,197,191.01
  5. Step 5: Solve for x
    x = 7,197,191.01/3,086.79
  6. Step 6: Final answer
    x = 2,331.61

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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.