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Finding the Fourth Proportional to 321,390.48, 443,511.81 and 178,149.27

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Solution

The fourth proportional to 321,390.48, 443,511.81 and 178,149.27 is: 245,842.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,390.48 : 443,511.81 = 178,149.27 : x
  2. Step 2: Convert to fraction form
    321,390.48/443,511.81 = 178,149.27/x
  3. Step 3: Cross multiply
    321,390.48x = 443,511.81 × 178,149.27
  4. Step 4: Simplify right side
    321,390.48x = 79,011,305,187.88
  5. Step 5: Solve for x
    x = 79,011,305,187.88/321,390.48
  6. Step 6: Final answer
    x = 245,842.08

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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.