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Finding the Fourth Proportional to 320.58, 481.05 and 248.85

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Solution

The fourth proportional to 320.58, 481.05 and 248.85 is: 373.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    320.58 : 481.05 = 248.85 : x
  2. Step 2: Convert to fraction form
    320.58/481.05 = 248.85/x
  3. Step 3: Cross multiply
    320.58x = 481.05 × 248.85
  4. Step 4: Simplify right side
    320.58x = 119,709.29
  5. Step 5: Solve for x
    x = 119,709.29/320.58
  6. Step 6: Final answer
    x = 373.41

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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.