Home / 2,868.21-3,958.74-1,689.53

Finding the Fourth Proportional to 2,868.21, 3,958.74 and 1,689.53

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Solution

The fourth proportional to 2,868.21, 3,958.74 and 1,689.53 is: 2,331.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,868.21 : 3,958.74 = 1,689.53 : x
  2. Step 2: Convert to fraction form
    2,868.21/3,958.74 = 1,689.53/x
  3. Step 3: Cross multiply
    2,868.21x = 3,958.74 × 1,689.53
  4. Step 4: Simplify right side
    2,868.21x = 6,688,390.20
  5. Step 5: Solve for x
    x = 6,688,390.20/2,868.21
  6. Step 6: Final answer
    x = 2,331.90

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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.