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Finding the Fourth Proportional to 378.13, 521.55 and 365.43

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Solution

The fourth proportional to 378.13, 521.55 and 365.43 is: 504.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    378.13 : 521.55 = 365.43 : x
  2. Step 2: Convert to fraction form
    378.13/521.55 = 365.43/x
  3. Step 3: Cross multiply
    378.13x = 521.55 × 365.43
  4. Step 4: Simplify right side
    378.13x = 190,585.58
  5. Step 5: Solve for x
    x = 190,585.58/378.13
  6. Step 6: Final answer
    x = 504.03

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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.