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Finding the Fourth Proportional to 503.53, 755.19 and 138.34

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Solution

The fourth proportional to 503.53, 755.19 and 138.34 is: 207.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    503.53 : 755.19 = 138.34 : x
  2. Step 2: Convert to fraction form
    503.53/755.19 = 138.34/x
  3. Step 3: Cross multiply
    503.53x = 755.19 × 138.34
  4. Step 4: Simplify right side
    503.53x = 104,472.98
  5. Step 5: Solve for x
    x = 104,472.98/503.53
  6. Step 6: Final answer
    x = 207.48

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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.