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Finding the Fourth Proportional to 394.93, 545.05 and 220.29

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Solution

The fourth proportional to 394.93, 545.05 and 220.29 is: 304.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    394.93 : 545.05 = 220.29 : x
  2. Step 2: Convert to fraction form
    394.93/545.05 = 220.29/x
  3. Step 3: Cross multiply
    394.93x = 545.05 × 220.29
  4. Step 4: Simplify right side
    394.93x = 120,069.06
  5. Step 5: Solve for x
    x = 120,069.06/394.93
  6. Step 6: Final answer
    x = 304.03

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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.