Home / 428,601.76-642,945.84-113,080.48

Finding the Fourth Proportional to 428,601.76, 642,945.84 and 113,080.48

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Solution

The fourth proportional to 428,601.76, 642,945.84 and 113,080.48 is: 169,632.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,601.76 : 642,945.84 = 113,080.48 : x
  2. Step 2: Convert to fraction form
    428,601.76/642,945.84 = 113,080.48/x
  3. Step 3: Cross multiply
    428,601.76x = 642,945.84 × 113,080.48
  4. Step 4: Simplify right side
    428,601.76x = 72,704,624,201.20
  5. Step 5: Solve for x
    x = 72,704,624,201.20/428,601.76
  6. Step 6: Final answer
    x = 169,632.12

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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.