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Finding the Fourth Proportional to 260.20, 390.43 and 162.67

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Solution

The fourth proportional to 260.20, 390.43 and 162.67 is: 244.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    260.20 : 390.43 = 162.67 : x
  2. Step 2: Convert to fraction form
    260.20/390.43 = 162.67/x
  3. Step 3: Cross multiply
    260.20x = 390.43 × 162.67
  4. Step 4: Simplify right side
    260.20x = 63,511.41
  5. Step 5: Solve for x
    x = 63,511.41/260.20
  6. Step 6: Final answer
    x = 244.09

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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.