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Finding the Fourth Proportional to 349.76, 482.43 and 218.75

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Solution

The fourth proportional to 349.76, 482.43 and 218.75 is: 301.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    349.76 : 482.43 = 218.75 : x
  2. Step 2: Convert to fraction form
    349.76/482.43 = 218.75/x
  3. Step 3: Cross multiply
    349.76x = 482.43 × 218.75
  4. Step 4: Simplify right side
    349.76x = 105,529.15
  5. Step 5: Solve for x
    x = 105,529.15/349.76
  6. Step 6: Final answer
    x = 301.72

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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.