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Finding the Fourth Proportional to 207,611.20, 311,416.80 and 203,674.60

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Solution

The fourth proportional to 207,611.20, 311,416.80 and 203,674.60 is: 305,511.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,611.20 : 311,416.80 = 203,674.60 : x
  2. Step 2: Convert to fraction form
    207,611.20/311,416.80 = 203,674.60/x
  3. Step 3: Cross multiply
    207,611.20x = 311,416.80 × 203,674.60
  4. Step 4: Simplify right side
    207,611.20x = 63,427,692,173.28
  5. Step 5: Solve for x
    x = 63,427,692,173.28/207,611.20
  6. Step 6: Final answer
    x = 305,511.90

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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.