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Finding the Fourth Proportional to 641,783.76, 962,662.72 and 221,050.32

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Solution

The fourth proportional to 641,783.76, 962,662.72 and 221,050.32 is: 331,571.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,783.76 : 962,662.72 = 221,050.32 : x
  2. Step 2: Convert to fraction form
    641,783.76/962,662.72 = 221,050.32/x
  3. Step 3: Cross multiply
    641,783.76x = 962,662.72 × 221,050.32
  4. Step 4: Simplify right side
    641,783.76x = 212,796,902,308.07
  5. Step 5: Solve for x
    x = 212,796,902,308.07/641,783.76
  6. Step 6: Final answer
    x = 331,571.03

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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.