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Finding the Fourth Proportional to 436.68, 655 and 275.48

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Solution

The fourth proportional to 436.68, 655 and 275.48 is: 413.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    436.68 : 655 = 275.48 : x
  2. Step 2: Convert to fraction form
    436.68/655 = 275.48/x
  3. Step 3: Cross multiply
    436.68x = 655 × 275.48
  4. Step 4: Simplify right side
    436.68x = 180,439.40
  5. Step 5: Solve for x
    x = 180,439.40/436.68
  6. Step 6: Final answer
    x = 413.21

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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.