Home / 428,858.08-643,288.80-179,365.12

Finding the Fourth Proportional to 428,858.08, 643,288.80 and 179,365.12

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Solution

The fourth proportional to 428,858.08, 643,288.80 and 179,365.12 is: 269,048.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,858.08 : 643,288.80 = 179,365.12 : x
  2. Step 2: Convert to fraction form
    428,858.08/643,288.80 = 179,365.12/x
  3. Step 3: Cross multiply
    428,858.08x = 643,288.80 × 179,365.12
  4. Step 4: Simplify right side
    428,858.08x = 115,383,572,806.66
  5. Step 5: Solve for x
    x = 115,383,572,806.66/428,858.08
  6. Step 6: Final answer
    x = 269,048.38

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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.