Home / 279,400.48-419,090.40-121,629.28

Finding the Fourth Proportional to 279,400.48, 419,090.40 and 121,629.28

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Solution

The fourth proportional to 279,400.48, 419,090.40 and 121,629.28 is: 182,439.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,400.48 : 419,090.40 = 121,629.28 : x
  2. Step 2: Convert to fraction form
    279,400.48/419,090.40 = 121,629.28/x
  3. Step 3: Cross multiply
    279,400.48x = 419,090.40 × 121,629.28
  4. Step 4: Simplify right side
    279,400.48x = 50,973,663,606.91
  5. Step 5: Solve for x
    x = 50,973,663,606.91/279,400.48
  6. Step 6: Final answer
    x = 182,439.43

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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.