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Finding the Fourth Proportional to 503.28, 693.90 and 378.41

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Solution

The fourth proportional to 503.28, 693.90 and 378.41 is: 521.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    503.28 : 693.90 = 378.41 : x
  2. Step 2: Convert to fraction form
    503.28/693.90 = 378.41/x
  3. Step 3: Cross multiply
    503.28x = 693.90 × 378.41
  4. Step 4: Simplify right side
    503.28x = 262,575.23
  5. Step 5: Solve for x
    x = 262,575.23/503.28
  6. Step 6: Final answer
    x = 521.73

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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.