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Finding the Fourth Proportional to 664,571.78, 996,809.30 and 259,688.15

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Solution

The fourth proportional to 664,571.78, 996,809.30 and 259,688.15 is: 389,513.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,571.78 : 996,809.30 = 259,688.15 : x
  2. Step 2: Convert to fraction form
    664,571.78/996,809.30 = 259,688.15/x
  3. Step 3: Cross multiply
    664,571.78x = 996,809.30 × 259,688.15
  4. Step 4: Simplify right side
    664,571.78x = 258,859,557,711.14
  5. Step 5: Solve for x
    x = 258,859,557,711.14/664,571.78
  6. Step 6: Final answer
    x = 389,513.32

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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.