Home / 421,231.04-631,879.20-140,749.28

Finding the Fourth Proportional to 421,231.04, 631,879.20 and 140,749.28

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Solution

The fourth proportional to 421,231.04, 631,879.20 and 140,749.28 is: 211,134.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,231.04 : 631,879.20 = 140,749.28 : x
  2. Step 2: Convert to fraction form
    421,231.04/631,879.20 = 140,749.28/x
  3. Step 3: Cross multiply
    421,231.04x = 631,879.20 × 140,749.28
  4. Step 4: Simplify right side
    421,231.04x = 88,936,542,446.98
  5. Step 5: Solve for x
    x = 88,936,542,446.98/421,231.04
  6. Step 6: Final answer
    x = 211,134.83

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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.