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Finding the Fourth Proportional to 324.68, 485.88 and 266.18

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Solution

The fourth proportional to 324.68, 485.88 and 266.18 is: 398.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    324.68 : 485.88 = 266.18 : x
  2. Step 2: Convert to fraction form
    324.68/485.88 = 266.18/x
  3. Step 3: Cross multiply
    324.68x = 485.88 × 266.18
  4. Step 4: Simplify right side
    324.68x = 129,331.54
  5. Step 5: Solve for x
    x = 129,331.54/324.68
  6. Step 6: Final answer
    x = 398.34

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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.