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Finding the Fourth Proportional to 321,320.35, 443,422.13 and 178,089.64

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Solution

The fourth proportional to 321,320.35, 443,422.13 and 178,089.64 is: 245,763.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,320.35 : 443,422.13 = 178,089.64 : x
  2. Step 2: Convert to fraction form
    321,320.35/443,422.13 = 178,089.64/x
  3. Step 3: Cross multiply
    321,320.35x = 443,422.13 × 178,089.64
  4. Step 4: Simplify right side
    321,320.35x = 78,968,887,499.73
  5. Step 5: Solve for x
    x = 78,968,887,499.73/321,320.35
  6. Step 6: Final answer
    x = 245,763.73

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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.