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Finding the Fourth Proportional to 321,679.53, 443,970.98 and 178,485.70

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Solution

The fourth proportional to 321,679.53, 443,970.98 and 178,485.70 is: 246,339.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,679.53 : 443,970.98 = 178,485.70 : x
  2. Step 2: Convert to fraction form
    321,679.53/443,970.98 = 178,485.70/x
  3. Step 3: Cross multiply
    321,679.53x = 443,970.98 × 178,485.70
  4. Step 4: Simplify right side
    321,679.53x = 79,242,471,144.99
  5. Step 5: Solve for x
    x = 79,242,471,144.99/321,679.53
  6. Step 6: Final answer
    x = 246,339.80

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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.