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Finding the Fourth Proportional to 321,390.96, 443,522.80 and 178,153.44

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Solution

The fourth proportional to 321,390.96, 443,522.80 and 178,153.44 is: 245,853.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,390.96 : 443,522.80 = 178,153.44 : x
  2. Step 2: Convert to fraction form
    321,390.96/443,522.80 = 178,153.44/x
  3. Step 3: Cross multiply
    321,390.96x = 443,522.80 × 178,153.44
  4. Step 4: Simplify right side
    321,390.96x = 79,015,112,538.43
  5. Step 5: Solve for x
    x = 79,015,112,538.43/321,390.96
  6. Step 6: Final answer
    x = 245,853.56

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1.5x scale

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.