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Finding the Fourth Proportional to 759.56, 1,048.21 and 445.03

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Solution

The fourth proportional to 759.56, 1,048.21 and 445.03 is: 614.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    759.56 : 1,048.21 = 445.03 : x
  2. Step 2: Convert to fraction form
    759.56/1,048.21 = 445.03/x
  3. Step 3: Cross multiply
    759.56x = 1,048.21 × 445.03
  4. Step 4: Simplify right side
    759.56x = 466,481.16
  5. Step 5: Solve for x
    x = 466,481.16/759.56
  6. Step 6: Final answer
    x = 614.15

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.