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Finding the Fourth Proportional to 378.34, 522.26 and 247.57

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Solution

The fourth proportional to 378.34, 522.26 and 247.57 is: 341.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    378.34 : 522.26 = 247.57 : x
  2. Step 2: Convert to fraction form
    378.34/522.26 = 247.57/x
  3. Step 3: Cross multiply
    378.34x = 522.26 × 247.57
  4. Step 4: Simplify right side
    378.34x = 129,295.91
  5. Step 5: Solve for x
    x = 129,295.91/378.34
  6. Step 6: Final answer
    x = 341.75

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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.