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Finding the Fourth Proportional to 450.72, 674.46 and 378.36

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Solution

The fourth proportional to 450.72, 674.46 and 378.36 is: 566.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    450.72 : 674.46 = 378.36 : x
  2. Step 2: Convert to fraction form
    450.72/674.46 = 378.36/x
  3. Step 3: Cross multiply
    450.72x = 674.46 × 378.36
  4. Step 4: Simplify right side
    450.72x = 255,188.69
  5. Step 5: Solve for x
    x = 255,188.69/450.72
  6. Step 6: Final answer
    x = 566.18

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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.