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Finding the Fourth Proportional to 300,991.71, 415,385.53 and 178,556.58

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Solution

The fourth proportional to 300,991.71, 415,385.53 and 178,556.58 is: 246,418.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    300,991.71 : 415,385.53 = 178,556.58 : x
  2. Step 2: Convert to fraction form
    300,991.71/415,385.53 = 178,556.58/x
  3. Step 3: Cross multiply
    300,991.71x = 415,385.53 × 178,556.58
  4. Step 4: Simplify right side
    300,991.71x = 74,169,819,618.29
  5. Step 5: Solve for x
    x = 74,169,819,618.29/300,991.71
  6. Step 6: Final answer
    x = 246,418.15

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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.