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Finding the Fourth Proportional to 535.52, 738.66 and 378.38

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Solution

The fourth proportional to 535.52, 738.66 and 378.38 is: 521.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    535.52 : 738.66 = 378.38 : x
  2. Step 2: Convert to fraction form
    535.52/738.66 = 378.38/x
  3. Step 3: Cross multiply
    535.52x = 738.66 × 378.38
  4. Step 4: Simplify right side
    535.52x = 279,490.48
  5. Step 5: Solve for x
    x = 279,490.48/535.52
  6. Step 6: Final answer
    x = 521.91

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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.