Home / 428,930.09-642,976.67-204,230.15

Finding the Fourth Proportional to 428,930.09, 642,976.67 and 204,230.15

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Solution

The fourth proportional to 428,930.09, 642,976.67 and 204,230.15 is: 306,145.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,930.09 : 642,976.67 = 204,230.15 : x
  2. Step 2: Convert to fraction form
    428,930.09/642,976.67 = 204,230.15/x
  3. Step 3: Cross multiply
    428,930.09x = 642,976.67 × 204,230.15
  4. Step 4: Simplify right side
    428,930.09x = 131,315,219,056.29
  5. Step 5: Solve for x
    x = 131,315,219,056.29/428,930.09
  6. Step 6: Final answer
    x = 306,145.97

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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.