Home / 428,923.31-642,966.57-204,223.37

Finding the Fourth Proportional to 428,923.31, 642,966.57 and 204,223.37

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Solution

The fourth proportional to 428,923.31, 642,966.57 and 204,223.37 is: 306,135.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,923.31 : 642,966.57 = 204,223.37 : x
  2. Step 2: Convert to fraction form
    428,923.31/642,966.57 = 204,223.37/x
  3. Step 3: Cross multiply
    428,923.31x = 642,966.57 × 204,223.37
  4. Step 4: Simplify right side
    428,923.31x = 131,308,796,507.91
  5. Step 5: Solve for x
    x = 131,308,796,507.91/428,923.31
  6. Step 6: Final answer
    x = 306,135.84

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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.