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Finding the Fourth Proportional to 319.83, 480.05 and 146.60

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Solution

The fourth proportional to 319.83, 480.05 and 146.60 is: 220.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    319.83 : 480.05 = 146.60 : x
  2. Step 2: Convert to fraction form
    319.83/480.05 = 146.60/x
  3. Step 3: Cross multiply
    319.83x = 480.05 × 146.60
  4. Step 4: Simplify right side
    319.83x = 70,372.20
  5. Step 5: Solve for x
    x = 70,372.20/319.83
  6. Step 6: Final answer
    x = 220.03

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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.