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Finding the Fourth Proportional to 316,558.80, 436,851.20 and 173,318.88

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Solution

The fourth proportional to 316,558.80, 436,851.20 and 173,318.88 is: 239,180.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    316,558.80 : 436,851.20 = 173,318.88 : x
  2. Step 2: Convert to fraction form
    316,558.80/436,851.20 = 173,318.88/x
  3. Step 3: Cross multiply
    316,558.80x = 436,851.20 × 173,318.88
  4. Step 4: Simplify right side
    316,558.80x = 75,714,560,710.66
  5. Step 5: Solve for x
    x = 75,714,560,710.66/316,558.80
  6. Step 6: Final answer
    x = 239,180.09

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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.