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Finding the Fourth Proportional to 260.64, 389.99 and 161.46

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Solution

The fourth proportional to 260.64, 389.99 and 161.46 is: 241.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    260.64 : 389.99 = 161.46 : x
  2. Step 2: Convert to fraction form
    260.64/389.99 = 161.46/x
  3. Step 3: Cross multiply
    260.64x = 389.99 × 161.46
  4. Step 4: Simplify right side
    260.64x = 62,966.98
  5. Step 5: Solve for x
    x = 62,966.98/260.64
  6. Step 6: Final answer
    x = 241.59

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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.