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Finding the Fourth Proportional to 503.08, 754.31 and 320.69

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Solution

The fourth proportional to 503.08, 754.31 and 320.69 is: 480.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    503.08 : 754.31 = 320.69 : x
  2. Step 2: Convert to fraction form
    503.08/754.31 = 320.69/x
  3. Step 3: Cross multiply
    503.08x = 754.31 × 320.69
  4. Step 4: Simplify right side
    503.08x = 241,902.36
  5. Step 5: Solve for x
    x = 241,902.36/503.08
  6. Step 6: Final answer
    x = 480.85

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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.