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Finding the Fourth Proportional to 321.91, 484.61 and 293.21

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Solution

The fourth proportional to 321.91, 484.61 and 293.21 is: 441.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    321.91 : 484.61 = 293.21 : x
  2. Step 2: Convert to fraction form
    321.91/484.61 = 293.21/x
  3. Step 3: Cross multiply
    321.91x = 484.61 × 293.21
  4. Step 4: Simplify right side
    321.91x = 142,090.57
  5. Step 5: Solve for x
    x = 142,090.57/321.91
  6. Step 6: Final answer
    x = 441.40

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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.