Home / 428,067.45-642,143.66-158,266.26

Finding the Fourth Proportional to 428,067.45, 642,143.66 and 158,266.26

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Solution

The fourth proportional to 428,067.45, 642,143.66 and 158,266.26 is: 237,415.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,067.45 : 642,143.66 = 158,266.26 : x
  2. Step 2: Convert to fraction form
    428,067.45/642,143.66 = 158,266.26/x
  3. Step 3: Cross multiply
    428,067.45x = 642,143.66 × 158,266.26
  4. Step 4: Simplify right side
    428,067.45x = 101,629,674,659.58
  5. Step 5: Solve for x
    x = 101,629,674,659.58/428,067.45
  6. Step 6: Final answer
    x = 237,415.10

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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.