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Finding the Fourth Proportional to 260.32, 359.52 and 211.72

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Solution

The fourth proportional to 260.32, 359.52 and 211.72 is: 292.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    260.32 : 359.52 = 211.72 : x
  2. Step 2: Convert to fraction form
    260.32/359.52 = 211.72/x
  3. Step 3: Cross multiply
    260.32x = 359.52 × 211.72
  4. Step 4: Simplify right side
    260.32x = 76,117.57
  5. Step 5: Solve for x
    x = 76,117.57/260.32
  6. Step 6: Final answer
    x = 292.40

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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.