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Finding the Fourth Proportional to 321,635.40, 482,339.79 and 132,040.68

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Solution

The fourth proportional to 321,635.40, 482,339.79 and 132,040.68 is: 198,014.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,635.40 : 482,339.79 = 132,040.68 : x
  2. Step 2: Convert to fraction form
    321,635.40/482,339.79 = 132,040.68/x
  3. Step 3: Cross multiply
    321,635.40x = 482,339.79 × 132,040.68
  4. Step 4: Simplify right side
    321,635.40x = 63,688,473,862.66
  5. Step 5: Solve for x
    x = 63,688,473,862.66/321,635.40
  6. Step 6: Final answer
    x = 198,014.50

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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.