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Finding the Fourth Proportional to 316,638.68, 436,958.09 and 171,441.96

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Solution

The fourth proportional to 316,638.68, 436,958.09 and 171,441.96 is: 236,588.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    316,638.68 : 436,958.09 = 171,441.96 : x
  2. Step 2: Convert to fraction form
    316,638.68/436,958.09 = 171,441.96/x
  3. Step 3: Cross multiply
    316,638.68x = 436,958.09 × 171,441.96
  4. Step 4: Simplify right side
    316,638.68x = 74,912,951,816.06
  5. Step 5: Solve for x
    x = 74,912,951,816.06/316,638.68
  6. Step 6: Final answer
    x = 236,588.13

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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.