Home / 2,868.35-3,958.55-1,689.65

Finding the Fourth Proportional to 2,868.35, 3,958.55 and 1,689.65

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Solution

The fourth proportional to 2,868.35, 3,958.55 and 1,689.65 is: 2,331.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,868.35 : 3,958.55 = 1,689.65 : x
  2. Step 2: Convert to fraction form
    2,868.35/3,958.55 = 1,689.65/x
  3. Step 3: Cross multiply
    2,868.35x = 3,958.55 × 1,689.65
  4. Step 4: Simplify right side
    2,868.35x = 6,688,564.01
  5. Step 5: Solve for x
    x = 6,688,564.01/2,868.35
  6. Step 6: Final answer
    x = 2,331.85

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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.