Home / 428,163.16-642,334.86-161,917.72

Finding the Fourth Proportional to 428,163.16, 642,334.86 and 161,917.72

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Solution

The fourth proportional to 428,163.16, 642,334.86 and 161,917.72 is: 242,910.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,163.16 : 642,334.86 = 161,917.72 : x
  2. Step 2: Convert to fraction form
    428,163.16/642,334.86 = 161,917.72/x
  3. Step 3: Cross multiply
    428,163.16x = 642,334.86 × 161,917.72
  4. Step 4: Simplify right side
    428,163.16x = 104,005,396,007.72
  5. Step 5: Solve for x
    x = 104,005,396,007.72/428,163.16
  6. Step 6: Final answer
    x = 242,910.66

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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.