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Finding the Fourth Proportional to 321,679.65, 443,971.15 and 178,485.83

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Solution

The fourth proportional to 321,679.65, 443,971.15 and 178,485.83 is: 246,339.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,679.65 : 443,971.15 = 178,485.83 : x
  2. Step 2: Convert to fraction form
    321,679.65/443,971.15 = 178,485.83/x
  3. Step 3: Cross multiply
    321,679.65x = 443,971.15 × 178,485.83
  4. Step 4: Simplify right side
    321,679.65x = 79,242,559,203.80
  5. Step 5: Solve for x
    x = 79,242,559,203.80/321,679.65
  6. Step 6: Final answer
    x = 246,339.98

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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.