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Finding the Fourth Proportional to 503.20, 694.39 and 304.20

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Solution

The fourth proportional to 503.20, 694.39 and 304.20 is: 419.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    503.20 : 694.39 = 304.20 : x
  2. Step 2: Convert to fraction form
    503.20/694.39 = 304.20/x
  3. Step 3: Cross multiply
    503.20x = 694.39 × 304.20
  4. Step 4: Simplify right side
    503.20x = 211,233.25
  5. Step 5: Solve for x
    x = 211,233.25/503.20
  6. Step 6: Final answer
    x = 419.78

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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.