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Finding the Fourth Proportional to 321,678.65, 443,969.78 and 178,484.83

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Solution

The fourth proportional to 321,678.65, 443,969.78 and 178,484.83 is: 246,338.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,678.65 : 443,969.78 = 178,484.83 : x
  2. Step 2: Convert to fraction form
    321,678.65/443,969.78 = 178,484.83/x
  3. Step 3: Cross multiply
    321,678.65x = 443,969.78 × 178,484.83
  4. Step 4: Simplify right side
    321,678.65x = 79,241,867,596.16
  5. Step 5: Solve for x
    x = 79,241,867,596.16/321,678.65
  6. Step 6: Final answer
    x = 246,338.60

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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.