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Finding the Fourth Proportional to 279,408.48, 419,102.40 and 121,637.28

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Solution

The fourth proportional to 279,408.48, 419,102.40 and 121,637.28 is: 182,451.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,408.48 : 419,102.40 = 121,637.28 : x
  2. Step 2: Convert to fraction form
    279,408.48/419,102.40 = 121,637.28/x
  3. Step 3: Cross multiply
    279,408.48x = 419,102.40 × 121,637.28
  4. Step 4: Simplify right side
    279,408.48x = 50,978,475,977.47
  5. Step 5: Solve for x
    x = 50,978,475,977.47/279,408.48
  6. Step 6: Final answer
    x = 182,451.43

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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.