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Finding the Fourth Proportional to 375.49, 518.12 and 218.10

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Solution

The fourth proportional to 375.49, 518.12 and 218.10 is: 300.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    375.49 : 518.12 = 218.10 : x
  2. Step 2: Convert to fraction form
    375.49/518.12 = 218.10/x
  3. Step 3: Cross multiply
    375.49x = 518.12 × 218.10
  4. Step 4: Simplify right side
    375.49x = 112,998.84
  5. Step 5: Solve for x
    x = 112,998.84/375.49
  6. Step 6: Final answer
    x = 300.94

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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.