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Finding the Fourth Proportional to 321,855.12, 482,869.78 and 97,222.86

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Solution

The fourth proportional to 321,855.12, 482,869.78 and 97,222.86 is: 145,860.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,855.12 : 482,869.78 = 97,222.86 : x
  2. Step 2: Convert to fraction form
    321,855.12/482,869.78 = 97,222.86/x
  3. Step 3: Cross multiply
    321,855.12x = 482,869.78 × 97,222.86
  4. Step 4: Simplify right side
    321,855.12x = 46,945,981,019.17
  5. Step 5: Solve for x
    x = 46,945,981,019.17/321,855.12
  6. Step 6: Final answer
    x = 145,860.60

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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.