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Finding the Fourth Proportional to 324.90, 448.56 and 251.39

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Solution

The fourth proportional to 324.90, 448.56 and 251.39 is: 347.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    324.90 : 448.56 = 251.39 : x
  2. Step 2: Convert to fraction form
    324.90/448.56 = 251.39/x
  3. Step 3: Cross multiply
    324.90x = 448.56 × 251.39
  4. Step 4: Simplify right side
    324.90x = 112,761.26
  5. Step 5: Solve for x
    x = 112,761.26/324.90
  6. Step 6: Final answer
    x = 347.06

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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.