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Finding the Fourth Proportional to 468.85, 647.18 and 321.97

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Solution

The fourth proportional to 468.85, 647.18 and 321.97 is: 444.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    468.85 : 647.18 = 321.97 : x
  2. Step 2: Convert to fraction form
    468.85/647.18 = 321.97/x
  3. Step 3: Cross multiply
    468.85x = 647.18 × 321.97
  4. Step 4: Simplify right side
    468.85x = 208,372.54
  5. Step 5: Solve for x
    x = 208,372.54/468.85
  6. Step 6: Final answer
    x = 444.43

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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.