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Finding the Fourth Proportional to 349.30, 482.34 and 218.53

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Solution

The fourth proportional to 349.30, 482.34 and 218.53 is: 301.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    349.30 : 482.34 = 218.53 : x
  2. Step 2: Convert to fraction form
    349.30/482.34 = 218.53/x
  3. Step 3: Cross multiply
    349.30x = 482.34 × 218.53
  4. Step 4: Simplify right side
    349.30x = 105,405.76
  5. Step 5: Solve for x
    x = 105,405.76/349.30
  6. Step 6: Final answer
    x = 301.76

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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.