Home / 420,481.28-630,936.96-198,805.76

Finding the Fourth Proportional to 420,481.28, 630,936.96 and 198,805.76

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Solution

The fourth proportional to 420,481.28, 630,936.96 and 198,805.76 is: 298,310.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,481.28 : 630,936.96 = 198,805.76 : x
  2. Step 2: Convert to fraction form
    420,481.28/630,936.96 = 198,805.76/x
  3. Step 3: Cross multiply
    420,481.28x = 630,936.96 × 198,805.76
  4. Step 4: Simplify right side
    420,481.28x = 125,433,901,844.89
  5. Step 5: Solve for x
    x = 125,433,901,844.89/420,481.28
  6. Step 6: Final answer
    x = 298,310.31

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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.