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Finding the Fourth Proportional to 299,847.40, 449,771.10 and 78,231.40

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Solution

The fourth proportional to 299,847.40, 449,771.10 and 78,231.40 is: 117,347.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    299,847.40 : 449,771.10 = 78,231.40 : x
  2. Step 2: Convert to fraction form
    299,847.40/449,771.10 = 78,231.40/x
  3. Step 3: Cross multiply
    299,847.40x = 449,771.10 × 78,231.40
  4. Step 4: Simplify right side
    299,847.40x = 35,186,222,832.54
  5. Step 5: Solve for x
    x = 35,186,222,832.54/299,847.40
  6. Step 6: Final answer
    x = 117,347.10

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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.