Home / 428,932.45-643,391.38-162,687.07

Finding the Fourth Proportional to 428,932.45, 643,391.38 and 162,687.07

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Solution

The fourth proportional to 428,932.45, 643,391.38 and 162,687.07 is: 244,027.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,932.45 : 643,391.38 = 162,687.07 : x
  2. Step 2: Convert to fraction form
    428,932.45/643,391.38 = 162,687.07/x
  3. Step 3: Cross multiply
    428,932.45x = 643,391.38 × 162,687.07
  4. Step 4: Simplify right side
    428,932.45x = 104,671,458,475.46
  5. Step 5: Solve for x
    x = 104,671,458,475.46/428,932.45
  6. Step 6: Final answer
    x = 244,027.84

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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.