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Finding the Fourth Proportional to 321.33, 482.07 and 90.22

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Solution

The fourth proportional to 321.33, 482.07 and 90.22 is: 135.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    321.33 : 482.07 = 90.22 : x
  2. Step 2: Convert to fraction form
    321.33/482.07 = 90.22/x
  3. Step 3: Cross multiply
    321.33x = 482.07 × 90.22
  4. Step 4: Simplify right side
    321.33x = 43,491.59
  5. Step 5: Solve for x
    x = 43,491.59/321.33
  6. Step 6: Final answer
    x = 135.35

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.