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Finding the Fourth Proportional to 3,396.53, 4,685.80 and 1,980.15

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Solution

The fourth proportional to 3,396.53, 4,685.80 and 1,980.15 is: 2,731.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,396.53 : 4,685.80 = 1,980.15 : x
  2. Step 2: Convert to fraction form
    3,396.53/4,685.80 = 1,980.15/x
  3. Step 3: Cross multiply
    3,396.53x = 4,685.80 × 1,980.15
  4. Step 4: Simplify right side
    3,396.53x = 9,278,568.06
  5. Step 5: Solve for x
    x = 9,278,568.06/3,396.53
  6. Step 6: Final answer
    x = 2,731.78

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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.