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Finding the Fourth Proportional to 320.60, 481.98 and 318.98

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Solution

The fourth proportional to 320.60, 481.98 and 318.98 is: 479.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    320.60 : 481.98 = 318.98 : x
  2. Step 2: Convert to fraction form
    320.60/481.98 = 318.98/x
  3. Step 3: Cross multiply
    320.60x = 481.98 × 318.98
  4. Step 4: Simplify right side
    320.60x = 153,741.98
  5. Step 5: Solve for x
    x = 153,741.98/320.60
  6. Step 6: Final answer
    x = 479.54

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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.