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Finding the Fourth Proportional to 394.01, 543.69 and 219.35

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Solution

The fourth proportional to 394.01, 543.69 and 219.35 is: 302.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    394.01 : 543.69 = 219.35 : x
  2. Step 2: Convert to fraction form
    394.01/543.69 = 219.35/x
  3. Step 3: Cross multiply
    394.01x = 543.69 × 219.35
  4. Step 4: Simplify right side
    394.01x = 119,258.40
  5. Step 5: Solve for x
    x = 119,258.40/394.01
  6. Step 6: Final answer
    x = 302.68

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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.