Home / 428,202.36-641,901.20-143,693.38

Finding the Fourth Proportional to 428,202.36, 641,901.20 and 143,693.38

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Solution

The fourth proportional to 428,202.36, 641,901.20 and 143,693.38 is: 215,405.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,202.36 : 641,901.20 = 143,693.38 : x
  2. Step 2: Convert to fraction form
    428,202.36/641,901.20 = 143,693.38/x
  3. Step 3: Cross multiply
    428,202.36x = 641,901.20 × 143,693.38
  4. Step 4: Simplify right side
    428,202.36x = 92,236,953,054.06
  5. Step 5: Solve for x
    x = 92,236,953,054.06/428,202.36
  6. Step 6: Final answer
    x = 215,405.06

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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.