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Finding the Fourth Proportional to 260.47, 359.13 and 213.79

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Solution

The fourth proportional to 260.47, 359.13 and 213.79 is: 294.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    260.47 : 359.13 = 213.79 : x
  2. Step 2: Convert to fraction form
    260.47/359.13 = 213.79/x
  3. Step 3: Cross multiply
    260.47x = 359.13 × 213.79
  4. Step 4: Simplify right side
    260.47x = 76,778.40
  5. Step 5: Solve for x
    x = 76,778.40/260.47
  6. Step 6: Final answer
    x = 294.77

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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.