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Finding the Fourth Proportional to 321.84, 482.58 and 193.68

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Solution

The fourth proportional to 321.84, 482.58 and 193.68 is: 290.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    321.84 : 482.58 = 193.68 : x
  2. Step 2: Convert to fraction form
    321.84/482.58 = 193.68/x
  3. Step 3: Cross multiply
    321.84x = 482.58 × 193.68
  4. Step 4: Simplify right side
    321.84x = 93,466.09
  5. Step 5: Solve for x
    x = 93,466.09/321.84
  6. Step 6: Final answer
    x = 290.41

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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.