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Finding the Fourth Proportional to 321,321.60, 443,423.85 and 178,090.89

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Solution

The fourth proportional to 321,321.60, 443,423.85 and 178,090.89 is: 245,765.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,321.60 : 443,423.85 = 178,090.89 : x
  2. Step 2: Convert to fraction form
    321,321.60/443,423.85 = 178,090.89/x
  3. Step 3: Cross multiply
    321,321.60x = 443,423.85 × 178,090.89
  4. Step 4: Simplify right side
    321,321.60x = 78,969,748,093.73
  5. Step 5: Solve for x
    x = 78,969,748,093.73/321,321.60
  6. Step 6: Final answer
    x = 245,765.45

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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.