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Finding the Fourth Proportional to 503.61, 755.29 and 138.38

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Solution

The fourth proportional to 503.61, 755.29 and 138.38 is: 207.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    503.61 : 755.29 = 138.38 : x
  2. Step 2: Convert to fraction form
    503.61/755.29 = 138.38/x
  3. Step 3: Cross multiply
    503.61x = 755.29 × 138.38
  4. Step 4: Simplify right side
    503.61x = 104,517.03
  5. Step 5: Solve for x
    x = 104,517.03/503.61
  6. Step 6: Final answer
    x = 207.54

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.