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Finding the Fourth Proportional to 537.12, 806.40 and 445.55

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Solution

The fourth proportional to 537.12, 806.40 and 445.55 is: 668.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    537.12 : 806.40 = 445.55 : x
  2. Step 2: Convert to fraction form
    537.12/806.40 = 445.55/x
  3. Step 3: Cross multiply
    537.12x = 806.40 × 445.55
  4. Step 4: Simplify right side
    537.12x = 359,287.49
  5. Step 5: Solve for x
    x = 359,287.49/537.12
  6. Step 6: Final answer
    x = 668.91

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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.