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Finding the Fourth Proportional to 395.11, 545.26 and 218.07

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Solution

The fourth proportional to 395.11, 545.26 and 218.07 is: 300.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    395.11 : 545.26 = 218.07 : x
  2. Step 2: Convert to fraction form
    395.11/545.26 = 218.07/x
  3. Step 3: Cross multiply
    395.11x = 545.26 × 218.07
  4. Step 4: Simplify right side
    395.11x = 118,904.98
  5. Step 5: Solve for x
    x = 118,904.98/395.11
  6. Step 6: Final answer
    x = 300.94

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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.