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Finding the Fourth Proportional to 324.07, 487.83 and 279.41

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Solution

The fourth proportional to 324.07, 487.83 and 279.41 is: 420.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    324.07 : 487.83 = 279.41 : x
  2. Step 2: Convert to fraction form
    324.07/487.83 = 279.41/x
  3. Step 3: Cross multiply
    324.07x = 487.83 × 279.41
  4. Step 4: Simplify right side
    324.07x = 136,304.58
  5. Step 5: Solve for x
    x = 136,304.58/324.07
  6. Step 6: Final answer
    x = 420.60

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.