Home / 428,311.08-642,468.06-108,462.83

Finding the Fourth Proportional to 428,311.08, 642,468.06 and 108,462.83

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Solution

The fourth proportional to 428,311.08, 642,468.06 and 108,462.83 is: 162,694.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,311.08 : 642,468.06 = 108,462.83 : x
  2. Step 2: Convert to fraction form
    428,311.08/642,468.06 = 108,462.83/x
  3. Step 3: Cross multiply
    428,311.08x = 642,468.06 × 108,462.83
  4. Step 4: Simplify right side
    428,311.08x = 69,683,900,759.87
  5. Step 5: Solve for x
    x = 69,683,900,759.87/428,311.08
  6. Step 6: Final answer
    x = 162,694.60

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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.