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Finding the Fourth Proportional to 365.61, 504.28 and 218.13

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Solution

The fourth proportional to 365.61, 504.28 and 218.13 is: 300.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    365.61 : 504.28 = 218.13 : x
  2. Step 2: Convert to fraction form
    365.61/504.28 = 218.13/x
  3. Step 3: Cross multiply
    365.61x = 504.28 × 218.13
  4. Step 4: Simplify right side
    365.61x = 109,998.60
  5. Step 5: Solve for x
    x = 109,998.60/365.61
  6. Step 6: Final answer
    x = 300.86

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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.