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Finding the Fourth Proportional to 378.12, 566.62 and 274.80

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Solution

The fourth proportional to 378.12, 566.62 and 274.80 is: 411.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    378.12 : 566.62 = 274.80 : x
  2. Step 2: Convert to fraction form
    378.12/566.62 = 274.80/x
  3. Step 3: Cross multiply
    378.12x = 566.62 × 274.80
  4. Step 4: Simplify right side
    378.12x = 155,707.18
  5. Step 5: Solve for x
    x = 155,707.18/378.12
  6. Step 6: Final answer
    x = 411.79

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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.