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Finding the Fourth Proportional to 748.04, 1,120.91 and 440.03

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Solution

The fourth proportional to 748.04, 1,120.91 and 440.03 is: 659.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    748.04 : 1,120.91 = 440.03 : x
  2. Step 2: Convert to fraction form
    748.04/1,120.91 = 440.03/x
  3. Step 3: Cross multiply
    748.04x = 1,120.91 × 440.03
  4. Step 4: Simplify right side
    748.04x = 493,234.63
  5. Step 5: Solve for x
    x = 493,234.63/748.04
  6. Step 6: Final answer
    x = 659.37

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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.