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Finding the Fourth Proportional to 480.20, 662.48 and 340.54

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Solution

The fourth proportional to 480.20, 662.48 and 340.54 is: 469.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    480.20 : 662.48 = 340.54 : x
  2. Step 2: Convert to fraction form
    480.20/662.48 = 340.54/x
  3. Step 3: Cross multiply
    480.20x = 662.48 × 340.54
  4. Step 4: Simplify right side
    480.20x = 225,600.94
  5. Step 5: Solve for x
    x = 225,600.94/480.20
  6. Step 6: Final answer
    x = 469.81

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.