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Finding the Fourth Proportional to 354,662.52, 489,367.28 and 211,435.88

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Solution

The fourth proportional to 354,662.52, 489,367.28 and 211,435.88 is: 291,741.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    354,662.52 : 489,367.28 = 211,435.88 : x
  2. Step 2: Convert to fraction form
    354,662.52/489,367.28 = 211,435.88/x
  3. Step 3: Cross multiply
    354,662.52x = 489,367.28 × 211,435.88
  4. Step 4: Simplify right side
    354,662.52x = 103,469,801,490.01
  5. Step 5: Solve for x
    x = 103,469,801,490.01/354,662.52
  6. Step 6: Final answer
    x = 291,741.57

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.