Home / 428,222.71-642,344.46-143,917.39

Finding the Fourth Proportional to 428,222.71, 642,344.46 and 143,917.39

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Solution

The fourth proportional to 428,222.71, 642,344.46 and 143,917.39 is: 215,879.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,222.71 : 642,344.46 = 143,917.39 : x
  2. Step 2: Convert to fraction form
    428,222.71/642,344.46 = 143,917.39/x
  3. Step 3: Cross multiply
    428,222.71x = 642,344.46 × 143,917.39
  4. Step 4: Simplify right side
    428,222.71x = 92,444,538,164.16
  5. Step 5: Solve for x
    x = 92,444,538,164.16/428,222.71
  6. Step 6: Final answer
    x = 215,879.58

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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.