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Finding the Fourth Proportional to 2,113.38, 3,170.06 and 959.12

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Solution

The fourth proportional to 2,113.38, 3,170.06 and 959.12 is: 1,438.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,113.38 : 3,170.06 = 959.12 : x
  2. Step 2: Convert to fraction form
    2,113.38/3,170.06 = 959.12/x
  3. Step 3: Cross multiply
    2,113.38x = 3,170.06 × 959.12
  4. Step 4: Simplify right side
    2,113.38x = 3,040,467.95
  5. Step 5: Solve for x
    x = 3,040,467.95/2,113.38
  6. Step 6: Final answer
    x = 1,438.68

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.