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Finding the Fourth Proportional to 321,379.65, 482,233.50 and 131,985.45

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Solution

The fourth proportional to 321,379.65, 482,233.50 and 131,985.45 is: 198,045.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,379.65 : 482,233.50 = 131,985.45 : x
  2. Step 2: Convert to fraction form
    321,379.65/482,233.50 = 131,985.45/x
  3. Step 3: Cross multiply
    321,379.65x = 482,233.50 × 131,985.45
  4. Step 4: Simplify right side
    321,379.65x = 63,647,805,502.58
  5. Step 5: Solve for x
    x = 63,647,805,502.58/321,379.65
  6. Step 6: Final answer
    x = 198,045.54

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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.