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Finding the Fourth Proportional to 303.21, 454.55 and 120.56

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Solution

The fourth proportional to 303.21, 454.55 and 120.56 is: 180.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    303.21 : 454.55 = 120.56 : x
  2. Step 2: Convert to fraction form
    303.21/454.55 = 120.56/x
  3. Step 3: Cross multiply
    303.21x = 454.55 × 120.56
  4. Step 4: Simplify right side
    303.21x = 54,802.02
  5. Step 5: Solve for x
    x = 54,802.02/303.21
  6. Step 6: Final answer
    x = 180.74

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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.