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Finding the Fourth Proportional to 320.30, 480.32 and 114.80

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Solution

The fourth proportional to 320.30, 480.32 and 114.80 is: 172.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    320.30 : 480.32 = 114.80 : x
  2. Step 2: Convert to fraction form
    320.30/480.32 = 114.80/x
  3. Step 3: Cross multiply
    320.30x = 480.32 × 114.80
  4. Step 4: Simplify right side
    320.30x = 55,140.16
  5. Step 5: Solve for x
    x = 55,140.16/320.30
  6. Step 6: Final answer
    x = 172.15

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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.