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Finding the Fourth Proportional to 484.82, 669.15 and 298.40

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Solution

The fourth proportional to 484.82, 669.15 and 298.40 is: 411.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    484.82 : 669.15 = 298.40 : x
  2. Step 2: Convert to fraction form
    484.82/669.15 = 298.40/x
  3. Step 3: Cross multiply
    484.82x = 669.15 × 298.40
  4. Step 4: Simplify right side
    484.82x = 199,676.03
  5. Step 5: Solve for x
    x = 199,676.03/484.82
  6. Step 6: Final answer
    x = 411.86

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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.