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Finding the Fourth Proportional to 316,433.43, 436,661.31 and 173,165.79

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Solution

The fourth proportional to 316,433.43, 436,661.31 and 173,165.79 is: 238,959.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    316,433.43 : 436,661.31 = 173,165.79 : x
  2. Step 2: Convert to fraction form
    316,433.43/436,661.31 = 173,165.79/x
  3. Step 3: Cross multiply
    316,433.43x = 436,661.31 × 173,165.79
  4. Step 4: Simplify right side
    316,433.43x = 75,614,800,708.58
  5. Step 5: Solve for x
    x = 75,614,800,708.58/316,433.43
  6. Step 6: Final answer
    x = 238,959.58

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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.