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Finding the Fourth Proportional to 665,889.78, 998,843.92 and 216,613.02

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Solution

The fourth proportional to 665,889.78, 998,843.92 and 216,613.02 is: 324,922.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,889.78 : 998,843.92 = 216,613.02 : x
  2. Step 2: Convert to fraction form
    665,889.78/998,843.92 = 216,613.02/x
  3. Step 3: Cross multiply
    665,889.78x = 998,843.92 × 216,613.02
  4. Step 4: Simplify right side
    665,889.78x = 216,362,598,019.84
  5. Step 5: Solve for x
    x = 216,362,598,019.84/665,889.78
  6. Step 6: Final answer
    x = 324,922.54

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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.