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Finding the Fourth Proportional to 321.83, 482.84 and 129.59

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Solution

The fourth proportional to 321.83, 482.84 and 129.59 is: 194.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    321.83 : 482.84 = 129.59 : x
  2. Step 2: Convert to fraction form
    321.83/482.84 = 129.59/x
  3. Step 3: Cross multiply
    321.83x = 482.84 × 129.59
  4. Step 4: Simplify right side
    321.83x = 62,570.59
  5. Step 5: Solve for x
    x = 62,570.59/321.83
  6. Step 6: Final answer
    x = 194.42

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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.