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Finding the Fourth Proportional to 299,872.20, 449,808.30 and 78,256.20

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Solution

The fourth proportional to 299,872.20, 449,808.30 and 78,256.20 is: 117,384.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    299,872.20 : 449,808.30 = 78,256.20 : x
  2. Step 2: Convert to fraction form
    299,872.20/449,808.30 = 78,256.20/x
  3. Step 3: Cross multiply
    299,872.20x = 449,808.30 × 78,256.20
  4. Step 4: Simplify right side
    299,872.20x = 35,200,288,286.46
  5. Step 5: Solve for x
    x = 35,200,288,286.46/299,872.20
  6. Step 6: Final answer
    x = 117,384.30

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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.