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Finding the Fourth Proportional to 297.40, 446.33 and 135.20

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Solution

The fourth proportional to 297.40, 446.33 and 135.20 is: 202.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    297.40 : 446.33 = 135.20 : x
  2. Step 2: Convert to fraction form
    297.40/446.33 = 135.20/x
  3. Step 3: Cross multiply
    297.40x = 446.33 × 135.20
  4. Step 4: Simplify right side
    297.40x = 60,340.91
  5. Step 5: Solve for x
    x = 60,340.91/297.40
  6. Step 6: Final answer
    x = 202.90

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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.