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Finding the Fourth Proportional to 260.26, 389.91 and 144.53

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Solution

The fourth proportional to 260.26, 389.91 and 144.53 is: 216.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    260.26 : 389.91 = 144.53 : x
  2. Step 2: Convert to fraction form
    260.26/389.91 = 144.53/x
  3. Step 3: Cross multiply
    260.26x = 389.91 × 144.53
  4. Step 4: Simplify right side
    260.26x = 56,353.69
  5. Step 5: Solve for x
    x = 56,353.69/260.26
  6. Step 6: Final answer
    x = 216.53

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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.