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Finding the Fourth Proportional to 354,634.72, 531,912.63 and 126,921.16

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Solution

The fourth proportional to 354,634.72, 531,912.63 and 126,921.16 is: 190,367.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    354,634.72 : 531,912.63 = 126,921.16 : x
  2. Step 2: Convert to fraction form
    354,634.72/531,912.63 = 126,921.16/x
  3. Step 3: Cross multiply
    354,634.72x = 531,912.63 × 126,921.16
  4. Step 4: Simplify right side
    354,634.72x = 67,510,968,018.25
  5. Step 5: Solve for x
    x = 67,510,968,018.25/354,634.72
  6. Step 6: Final answer
    x = 190,367.62

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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.