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Finding the Fourth Proportional to 324.74, 448.45 and 208.51

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Solution

The fourth proportional to 324.74, 448.45 and 208.51 is: 287.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    324.74 : 448.45 = 208.51 : x
  2. Step 2: Convert to fraction form
    324.74/448.45 = 208.51/x
  3. Step 3: Cross multiply
    324.74x = 448.45 × 208.51
  4. Step 4: Simplify right side
    324.74x = 93,504.67
  5. Step 5: Solve for x
    x = 93,504.67/324.74
  6. Step 6: Final answer
    x = 287.93

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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.