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Finding the Fourth Proportional to 349.47, 482.20 and 218.65

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Solution

The fourth proportional to 349.47, 482.20 and 218.65 is: 301.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    349.47 : 482.20 = 218.65 : x
  2. Step 2: Convert to fraction form
    349.47/482.20 = 218.65/x
  3. Step 3: Cross multiply
    349.47x = 482.20 × 218.65
  4. Step 4: Simplify right side
    349.47x = 105,433.03
  5. Step 5: Solve for x
    x = 105,433.03/349.47
  6. Step 6: Final answer
    x = 301.69

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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.