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Finding the Fourth Proportional to 297.88, 446.82 and 143.78

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Solution

The fourth proportional to 297.88, 446.82 and 143.78 is: 215.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    297.88 : 446.82 = 143.78 : x
  2. Step 2: Convert to fraction form
    297.88/446.82 = 143.78/x
  3. Step 3: Cross multiply
    297.88x = 446.82 × 143.78
  4. Step 4: Simplify right side
    297.88x = 64,241.55
  5. Step 5: Solve for x
    x = 64,241.55/297.88
  6. Step 6: Final answer
    x = 215.66

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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.