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Finding the Fourth Proportional to 378.24, 522.09 and 253.91

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Solution

The fourth proportional to 378.24, 522.09 and 253.91 is: 350.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    378.24 : 522.09 = 253.91 : x
  2. Step 2: Convert to fraction form
    378.24/522.09 = 253.91/x
  3. Step 3: Cross multiply
    378.24x = 522.09 × 253.91
  4. Step 4: Simplify right side
    378.24x = 132,561.26
  5. Step 5: Solve for x
    x = 132,561.26/378.24
  6. Step 6: Final answer
    x = 350.47

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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.