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Finding the Fourth Proportional to 3,440.25, 5,160.38 and 843.21

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Solution

The fourth proportional to 3,440.25, 5,160.38 and 843.21 is: 1,264.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,440.25 : 5,160.38 = 843.21 : x
  2. Step 2: Convert to fraction form
    3,440.25/5,160.38 = 843.21/x
  3. Step 3: Cross multiply
    3,440.25x = 5,160.38 × 843.21
  4. Step 4: Simplify right side
    3,440.25x = 4,351,279.80
  5. Step 5: Solve for x
    x = 4,351,279.80/3,440.25
  6. Step 6: Final answer
    x = 1,264.82

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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.