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Finding the Fourth Proportional to 445.74, 617.93 and 436.80

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Solution

The fourth proportional to 445.74, 617.93 and 436.80 is: 605.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    445.74 : 617.93 = 436.80 : x
  2. Step 2: Convert to fraction form
    445.74/617.93 = 436.80/x
  3. Step 3: Cross multiply
    445.74x = 617.93 × 436.80
  4. Step 4: Simplify right side
    445.74x = 269,909.64
  5. Step 5: Solve for x
    x = 269,909.64/445.74
  6. Step 6: Final answer
    x = 605.53

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.