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Finding the Fourth Proportional to 299,786.40, 449,901.40 and 142,015.20

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Solution

The fourth proportional to 299,786.40, 449,901.40 and 142,015.20 is: 213,127.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    299,786.40 : 449,901.40 = 142,015.20 : x
  2. Step 2: Convert to fraction form
    299,786.40/449,901.40 = 142,015.20/x
  3. Step 3: Cross multiply
    299,786.40x = 449,901.40 × 142,015.20
  4. Step 4: Simplify right side
    299,786.40x = 63,892,837,301.28
  5. Step 5: Solve for x
    x = 63,892,837,301.28/299,786.40
  6. Step 6: Final answer
    x = 213,127.87

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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.