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Finding the Fourth Proportional to 365.51, 547.18 and 220.79

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Solution

The fourth proportional to 365.51, 547.18 and 220.79 is: 330.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    365.51 : 547.18 = 220.79 : x
  2. Step 2: Convert to fraction form
    365.51/547.18 = 220.79/x
  3. Step 3: Cross multiply
    365.51x = 547.18 × 220.79
  4. Step 4: Simplify right side
    365.51x = 120,808.58
  5. Step 5: Solve for x
    x = 120,808.58/365.51
  6. Step 6: Final answer
    x = 330.53

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.