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Finding the Fourth Proportional to 316,609.43, 436,904.75 and 173,341.78

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Solution

The fourth proportional to 316,609.43, 436,904.75 and 173,341.78 is: 239,202.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    316,609.43 : 436,904.75 = 173,341.78 : x
  2. Step 2: Convert to fraction form
    316,609.43/436,904.75 = 173,341.78/x
  3. Step 3: Cross multiply
    316,609.43x = 436,904.75 × 173,341.78
  4. Step 4: Simplify right side
    316,609.43x = 75,733,846,396.55
  5. Step 5: Solve for x
    x = 75,733,846,396.55/316,609.43
  6. Step 6: Final answer
    x = 239,202.75

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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.