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Finding the Fourth Proportional to 316,394.78, 436,634.96 and 173,154.65

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Solution

The fourth proportional to 316,394.78, 436,634.96 and 173,154.65 is: 238,958.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    316,394.78 : 436,634.96 = 173,154.65 : x
  2. Step 2: Convert to fraction form
    316,394.78/436,634.96 = 173,154.65/x
  3. Step 3: Cross multiply
    316,394.78x = 436,634.96 × 173,154.65
  4. Step 4: Simplify right side
    316,394.78x = 75,605,370,627.62
  5. Step 5: Solve for x
    x = 75,605,370,627.62/316,394.78
  6. Step 6: Final answer
    x = 238,958.97

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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.