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Finding the Fourth Proportional to 320.36, 480.54 and 166.19

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Solution

The fourth proportional to 320.36, 480.54 and 166.19 is: 249.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    320.36 : 480.54 = 166.19 : x
  2. Step 2: Convert to fraction form
    320.36/480.54 = 166.19/x
  3. Step 3: Cross multiply
    320.36x = 480.54 × 166.19
  4. Step 4: Simplify right side
    320.36x = 79,859.16
  5. Step 5: Solve for x
    x = 79,859.16/320.36
  6. Step 6: Final answer
    x = 249.28

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Double scale
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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.