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Finding the Fourth Proportional to 260.54, 390.72 and 106.38

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Solution

The fourth proportional to 260.54, 390.72 and 106.38 is: 159.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    260.54 : 390.72 = 106.38 : x
  2. Step 2: Convert to fraction form
    260.54/390.72 = 106.38/x
  3. Step 3: Cross multiply
    260.54x = 390.72 × 106.38
  4. Step 4: Simplify right side
    260.54x = 41,564.79
  5. Step 5: Solve for x
    x = 41,564.79/260.54
  6. Step 6: Final answer
    x = 159.53

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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.