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Finding the Fourth Proportional to 324.37, 486.40 and 208.88

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Solution

The fourth proportional to 324.37, 486.40 and 208.88 is: 313.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    324.37 : 486.40 = 208.88 : x
  2. Step 2: Convert to fraction form
    324.37/486.40 = 208.88/x
  3. Step 3: Cross multiply
    324.37x = 486.40 × 208.88
  4. Step 4: Simplify right side
    324.37x = 101,595.76
  5. Step 5: Solve for x
    x = 101,595.76/324.37
  6. Step 6: Final answer
    x = 313.21

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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.