Home / 428,621.24-642,958.59-113,078.45

Finding the Fourth Proportional to 428,621.24, 642,958.59 and 113,078.45

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Solution

The fourth proportional to 428,621.24, 642,958.59 and 113,078.45 is: 169,624.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,621.24 : 642,958.59 = 113,078.45 : x
  2. Step 2: Convert to fraction form
    428,621.24/642,958.59 = 113,078.45/x
  3. Step 3: Cross multiply
    428,621.24x = 642,958.59 × 113,078.45
  4. Step 4: Simplify right side
    428,621.24x = 72,704,762,378.78
  5. Step 5: Solve for x
    x = 72,704,762,378.78/428,621.24
  6. Step 6: Final answer
    x = 169,624.73

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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.