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Finding the Fourth Proportional to 297.07, 445.55 and 80.66

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Solution

The fourth proportional to 297.07, 445.55 and 80.66 is: 120.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    297.07 : 445.55 = 80.66 : x
  2. Step 2: Convert to fraction form
    297.07/445.55 = 80.66/x
  3. Step 3: Cross multiply
    297.07x = 445.55 × 80.66
  4. Step 4: Simplify right side
    297.07x = 35,939.38
  5. Step 5: Solve for x
    x = 35,939.38/297.07
  6. Step 6: Final answer
    x = 120.98

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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.