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Finding the Fourth Proportional to 345.24, 518.18 and 208.41

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Solution

The fourth proportional to 345.24, 518.18 and 208.41 is: 312.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    345.24 : 518.18 = 208.41 : x
  2. Step 2: Convert to fraction form
    345.24/518.18 = 208.41/x
  3. Step 3: Cross multiply
    345.24x = 518.18 × 208.41
  4. Step 4: Simplify right side
    345.24x = 107,992.85
  5. Step 5: Solve for x
    x = 107,992.85/345.24
  6. Step 6: Final answer
    x = 312.81

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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.