Home / 421,619.82-631,405.89-231,790.38

Finding the Fourth Proportional to 421,619.82, 631,405.89 and 231,790.38

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Solution

The fourth proportional to 421,619.82, 631,405.89 and 231,790.38 is: 347,122.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,619.82 : 631,405.89 = 231,790.38 : x
  2. Step 2: Convert to fraction form
    421,619.82/631,405.89 = 231,790.38/x
  3. Step 3: Cross multiply
    421,619.82x = 631,405.89 × 231,790.38
  4. Step 4: Simplify right side
    421,619.82x = 146,353,811,177.34
  5. Step 5: Solve for x
    x = 146,353,811,177.34/421,619.82
  6. Step 6: Final answer
    x = 347,122.70

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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.