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Finding the Fourth Proportional to 321,776.40, 482,820.42 and 132,376.73

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Solution

The fourth proportional to 321,776.40, 482,820.42 and 132,376.73 is: 198,629.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,776.40 : 482,820.42 = 132,376.73 : x
  2. Step 2: Convert to fraction form
    321,776.40/482,820.42 = 132,376.73/x
  3. Step 3: Cross multiply
    321,776.40x = 482,820.42 × 132,376.73
  4. Step 4: Simplify right side
    321,776.40x = 63,914,188,376.83
  5. Step 5: Solve for x
    x = 63,914,188,376.83/321,776.40
  6. Step 6: Final answer
    x = 198,629.20

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.