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Finding the Fourth Proportional to 297.74, 446.49 and 143.55

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Solution

The fourth proportional to 297.74, 446.49 and 143.55 is: 215.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    297.74 : 446.49 = 143.55 : x
  2. Step 2: Convert to fraction form
    297.74/446.49 = 143.55/x
  3. Step 3: Cross multiply
    297.74x = 446.49 × 143.55
  4. Step 4: Simplify right side
    297.74x = 64,093.64
  5. Step 5: Solve for x
    x = 64,093.64/297.74
  6. Step 6: Final answer
    x = 215.27

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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.