Home / 428,424.12-641,960.24-158,180.64

Finding the Fourth Proportional to 428,424.12, 641,960.24 and 158,180.64

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Solution

The fourth proportional to 428,424.12, 641,960.24 and 158,180.64 is: 237,021.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,424.12 : 641,960.24 = 158,180.64 : x
  2. Step 2: Convert to fraction form
    428,424.12/641,960.24 = 158,180.64/x
  3. Step 3: Cross multiply
    428,424.12x = 641,960.24 × 158,180.64
  4. Step 4: Simplify right side
    428,424.12x = 101,545,681,617.75
  5. Step 5: Solve for x
    x = 101,545,681,617.75/428,424.12
  6. Step 6: Final answer
    x = 237,021.39

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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.