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Finding the Fourth Proportional to 260.83, 390.97 and 123.81

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Solution

The fourth proportional to 260.83, 390.97 and 123.81 is: 185.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    260.83 : 390.97 = 123.81 : x
  2. Step 2: Convert to fraction form
    260.83/390.97 = 123.81/x
  3. Step 3: Cross multiply
    260.83x = 390.97 × 123.81
  4. Step 4: Simplify right side
    260.83x = 48,406.00
  5. Step 5: Solve for x
    x = 48,406.00/260.83
  6. Step 6: Final answer
    x = 185.58

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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.