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Finding the Fourth Proportional to 1,611.32, 2,414.40 and 993.20

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Solution

The fourth proportional to 1,611.32, 2,414.40 and 993.20 is: 1,488.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,611.32 : 2,414.40 = 993.20 : x
  2. Step 2: Convert to fraction form
    1,611.32/2,414.40 = 993.20/x
  3. Step 3: Cross multiply
    1,611.32x = 2,414.40 × 993.20
  4. Step 4: Simplify right side
    1,611.32x = 2,397,982.08
  5. Step 5: Solve for x
    x = 2,397,982.08/1,611.32
  6. Step 6: Final answer
    x = 1,488.21

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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.