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Finding the Fourth Proportional to 320.08, 480 and 137.38

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Solution

The fourth proportional to 320.08, 480 and 137.38 is: 206.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    320.08 : 480 = 137.38 : x
  2. Step 2: Convert to fraction form
    320.08/480 = 137.38/x
  3. Step 3: Cross multiply
    320.08x = 480 × 137.38
  4. Step 4: Simplify right side
    320.08x = 65,942.40
  5. Step 5: Solve for x
    x = 65,942.40/320.08
  6. Step 6: Final answer
    x = 206.02

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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.