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Finding the Fourth Proportional to 207,371.20, 311,056.80 and 203,915.20

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Solution

The fourth proportional to 207,371.20, 311,056.80 and 203,915.20 is: 305,872.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,371.20 : 311,056.80 = 203,915.20 : x
  2. Step 2: Convert to fraction form
    207,371.20/311,056.80 = 203,915.20/x
  3. Step 3: Cross multiply
    207,371.20x = 311,056.80 × 203,915.20
  4. Step 4: Simplify right side
    207,371.20x = 63,429,209,583.36
  5. Step 5: Solve for x
    x = 63,429,209,583.36/207,371.20
  6. Step 6: Final answer
    x = 305,872.80

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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.