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Finding the Fourth Proportional to 503.40, 754.89 and 320.54

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Solution

The fourth proportional to 503.40, 754.89 and 320.54 is: 480.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    503.40 : 754.89 = 320.54 : x
  2. Step 2: Convert to fraction form
    503.40/754.89 = 320.54/x
  3. Step 3: Cross multiply
    503.40x = 754.89 × 320.54
  4. Step 4: Simplify right side
    503.40x = 241,972.44
  5. Step 5: Solve for x
    x = 241,972.44/503.40
  6. Step 6: Final answer
    x = 480.68

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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.