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Finding the Fourth Proportional to 320.55, 480.89 and 104.13

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Solution

The fourth proportional to 320.55, 480.89 and 104.13 is: 156.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    320.55 : 480.89 = 104.13 : x
  2. Step 2: Convert to fraction form
    320.55/480.89 = 104.13/x
  3. Step 3: Cross multiply
    320.55x = 480.89 × 104.13
  4. Step 4: Simplify right side
    320.55x = 50,074.56
  5. Step 5: Solve for x
    x = 50,074.56/320.55
  6. Step 6: Final answer
    x = 156.21

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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.