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Finding the Fourth Proportional to 481.21, 663.36 and 340.89

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Solution

The fourth proportional to 481.21, 663.36 and 340.89 is: 469.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    481.21 : 663.36 = 340.89 : x
  2. Step 2: Convert to fraction form
    481.21/663.36 = 340.89/x
  3. Step 3: Cross multiply
    481.21x = 663.36 × 340.89
  4. Step 4: Simplify right side
    481.21x = 226,132.79
  5. Step 5: Solve for x
    x = 226,132.79/481.21
  6. Step 6: Final answer
    x = 469.93

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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.