Home / 2,867.91-3,957.36-1,688.75

Finding the Fourth Proportional to 2,867.91, 3,957.36 and 1,688.75

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Solution

The fourth proportional to 2,867.91, 3,957.36 and 1,688.75 is: 2,330.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,867.91 : 3,957.36 = 1,688.75 : x
  2. Step 2: Convert to fraction form
    2,867.91/3,957.36 = 1,688.75/x
  3. Step 3: Cross multiply
    2,867.91x = 3,957.36 × 1,688.75
  4. Step 4: Simplify right side
    2,867.91x = 6,682,991.70
  5. Step 5: Solve for x
    x = 6,682,991.70/2,867.91
  6. Step 6: Final answer
    x = 2,330.27

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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.