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Finding the Fourth Proportional to 378, 522.66 and 300.24

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Solution

The fourth proportional to 378, 522.66 and 300.24 is: 415.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    378 : 522.66 = 300.24 : x
  2. Step 2: Convert to fraction form
    378/522.66 = 300.24/x
  3. Step 3: Cross multiply
    378x = 522.66 × 300.24
  4. Step 4: Simplify right side
    378x = 156,923.44
  5. Step 5: Solve for x
    x = 156,923.44/378
  6. Step 6: Final answer
    x = 415.14

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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.