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Finding the Fourth Proportional to 394.69, 544.69 and 220.03

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Solution

The fourth proportional to 394.69, 544.69 and 220.03 is: 303.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    394.69 : 544.69 = 220.03 : x
  2. Step 2: Convert to fraction form
    394.69/544.69 = 220.03/x
  3. Step 3: Cross multiply
    394.69x = 544.69 × 220.03
  4. Step 4: Simplify right side
    394.69x = 119,848.14
  5. Step 5: Solve for x
    x = 119,848.14/394.69
  6. Step 6: Final answer
    x = 303.65

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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.