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Finding the Fourth Proportional to 437.26, 655.40 and 231.38

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Solution

The fourth proportional to 437.26, 655.40 and 231.38 is: 346.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    437.26 : 655.40 = 231.38 : x
  2. Step 2: Convert to fraction form
    437.26/655.40 = 231.38/x
  3. Step 3: Cross multiply
    437.26x = 655.40 × 231.38
  4. Step 4: Simplify right side
    437.26x = 151,646.45
  5. Step 5: Solve for x
    x = 151,646.45/437.26
  6. Step 6: Final answer
    x = 346.81

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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.