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Finding the Fourth Proportional to 436.80, 655.02 and 231.24

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Solution

The fourth proportional to 436.80, 655.02 and 231.24 is: 346.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    436.80 : 655.02 = 231.24 : x
  2. Step 2: Convert to fraction form
    436.80/655.02 = 231.24/x
  3. Step 3: Cross multiply
    436.80x = 655.02 × 231.24
  4. Step 4: Simplify right side
    436.80x = 151,466.82
  5. Step 5: Solve for x
    x = 151,466.82/436.80
  6. Step 6: Final answer
    x = 346.76

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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.