Home / 428,185.19-642,076.65-248,321.75

Finding the Fourth Proportional to 428,185.19, 642,076.65 and 248,321.75

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Solution

The fourth proportional to 428,185.19, 642,076.65 and 248,321.75 is: 372,365.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,185.19 : 642,076.65 = 248,321.75 : x
  2. Step 2: Convert to fraction form
    428,185.19/642,076.65 = 248,321.75/x
  3. Step 3: Cross multiply
    428,185.19x = 642,076.65 × 248,321.75
  4. Step 4: Simplify right side
    428,185.19x = 159,441,594,151.75
  5. Step 5: Solve for x
    x = 159,441,594,151.75/428,185.19
  6. Step 6: Final answer
    x = 372,365.97

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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.