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Finding the Fourth Proportional to 290,961.28, 401,522.70 and 163,636.87

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Solution

The fourth proportional to 290,961.28, 401,522.70 and 163,636.87 is: 225,816.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,961.28 : 401,522.70 = 163,636.87 : x
  2. Step 2: Convert to fraction form
    290,961.28/401,522.70 = 163,636.87/x
  3. Step 3: Cross multiply
    290,961.28x = 401,522.70 × 163,636.87
  4. Step 4: Simplify right side
    290,961.28x = 65,703,917,861.95
  5. Step 5: Solve for x
    x = 65,703,917,861.95/290,961.28
  6. Step 6: Final answer
    x = 225,816.71

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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.