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Finding the Fourth Proportional to 378.13, 522.07 and 247.37

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Solution

The fourth proportional to 378.13, 522.07 and 247.37 is: 341.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    378.13 : 522.07 = 247.37 : x
  2. Step 2: Convert to fraction form
    378.13/522.07 = 247.37/x
  3. Step 3: Cross multiply
    378.13x = 522.07 × 247.37
  4. Step 4: Simplify right side
    378.13x = 129,144.46
  5. Step 5: Solve for x
    x = 129,144.46/378.13
  6. Step 6: Final answer
    x = 341.53

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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.