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Finding the Fourth Proportional to 436.88, 655.20 and 190.05

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Solution

The fourth proportional to 436.88, 655.20 and 190.05 is: 285.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    436.88 : 655.20 = 190.05 : x
  2. Step 2: Convert to fraction form
    436.88/655.20 = 190.05/x
  3. Step 3: Cross multiply
    436.88x = 655.20 × 190.05
  4. Step 4: Simplify right side
    436.88x = 124,517.77
  5. Step 5: Solve for x
    x = 124,517.77/436.88
  6. Step 6: Final answer
    x = 285.02

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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.