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Finding the Fourth Proportional to 503.20, 755.31 and 445.79

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Solution

The fourth proportional to 503.20, 755.31 and 445.79 is: 669.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    503.20 : 755.31 = 445.79 : x
  2. Step 2: Convert to fraction form
    503.20/755.31 = 445.79/x
  3. Step 3: Cross multiply
    503.20x = 755.31 × 445.79
  4. Step 4: Simplify right side
    503.20x = 336,709.64
  5. Step 5: Solve for x
    x = 336,709.64/503.20
  6. Step 6: Final answer
    x = 669.14

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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.