Home / 428,422.12-641,957.24-158,178.64

Finding the Fourth Proportional to 428,422.12, 641,957.24 and 158,178.64

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Solution

The fourth proportional to 428,422.12, 641,957.24 and 158,178.64 is: 237,018.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,422.12 : 641,957.24 = 158,178.64 : x
  2. Step 2: Convert to fraction form
    428,422.12/641,957.24 = 158,178.64/x
  3. Step 3: Cross multiply
    428,422.12x = 641,957.24 × 158,178.64
  4. Step 4: Simplify right side
    428,422.12x = 101,543,923,161.35
  5. Step 5: Solve for x
    x = 101,543,923,161.35/428,422.12
  6. Step 6: Final answer
    x = 237,018.39

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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.