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Finding the Fourth Proportional to 260.22, 389.52 and 186.98

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Solution

The fourth proportional to 260.22, 389.52 and 186.98 is: 279.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    260.22 : 389.52 = 186.98 : x
  2. Step 2: Convert to fraction form
    260.22/389.52 = 186.98/x
  3. Step 3: Cross multiply
    260.22x = 389.52 × 186.98
  4. Step 4: Simplify right side
    260.22x = 72,830.50
  5. Step 5: Solve for x
    x = 72,830.50/260.22
  6. Step 6: Final answer
    x = 279.88

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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.