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Finding the Fourth Proportional to 366.06, 505.17 and 218.90

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Solution

The fourth proportional to 366.06, 505.17 and 218.90 is: 302.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    366.06 : 505.17 = 218.90 : x
  2. Step 2: Convert to fraction form
    366.06/505.17 = 218.90/x
  3. Step 3: Cross multiply
    366.06x = 505.17 × 218.90
  4. Step 4: Simplify right side
    366.06x = 110,581.71
  5. Step 5: Solve for x
    x = 110,581.71/366.06
  6. Step 6: Final answer
    x = 302.09

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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.