Home / 2,868.18-3,958.38-1,689.64

Finding the Fourth Proportional to 2,868.18, 3,958.38 and 1,689.64

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Solution

The fourth proportional to 2,868.18, 3,958.38 and 1,689.64 is: 2,331.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,868.18 : 3,958.38 = 1,689.64 : x
  2. Step 2: Convert to fraction form
    2,868.18/3,958.38 = 1,689.64/x
  3. Step 3: Cross multiply
    2,868.18x = 3,958.38 × 1,689.64
  4. Step 4: Simplify right side
    2,868.18x = 6,688,237.18
  5. Step 5: Solve for x
    x = 6,688,237.18/2,868.18
  6. Step 6: Final answer
    x = 2,331.87

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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.