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Finding the Fourth Proportional to 378.36, 520.56 and 334.62

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Solution

The fourth proportional to 378.36, 520.56 and 334.62 is: 460.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    378.36 : 520.56 = 334.62 : x
  2. Step 2: Convert to fraction form
    378.36/520.56 = 334.62/x
  3. Step 3: Cross multiply
    378.36x = 520.56 × 334.62
  4. Step 4: Simplify right side
    378.36x = 174,189.79
  5. Step 5: Solve for x
    x = 174,189.79/378.36
  6. Step 6: Final answer
    x = 460.38

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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.