Home / 840,218.82-1,260,321.75-209,128.38

Finding the Fourth Proportional to 840,218.82, 1,260,321.75 and 209,128.38

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Solution

The fourth proportional to 840,218.82, 1,260,321.75 and 209,128.38 is: 313,690.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    840,218.82 : 1,260,321.75 = 209,128.38 : x
  2. Step 2: Convert to fraction form
    840,218.82/1,260,321.75 = 209,128.38/x
  3. Step 3: Cross multiply
    840,218.82x = 1,260,321.75 × 209,128.38
  4. Step 4: Simplify right side
    840,218.82x = 263,569,045,856.27
  5. Step 5: Solve for x
    x = 263,569,045,856.27/840,218.82
  6. Step 6: Final answer
    x = 313,690.96

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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.