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Finding the Fourth Proportional to 320.60, 480.90 and 104.18

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Solution

The fourth proportional to 320.60, 480.90 and 104.18 is: 156.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    320.60 : 480.90 = 104.18 : x
  2. Step 2: Convert to fraction form
    320.60/480.90 = 104.18/x
  3. Step 3: Cross multiply
    320.60x = 480.90 × 104.18
  4. Step 4: Simplify right side
    320.60x = 50,100.16
  5. Step 5: Solve for x
    x = 50,100.16/320.60
  6. Step 6: Final answer
    x = 156.27

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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.