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Finding the Fourth Proportional to 450.89, 621.82 and 303.72

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Solution

The fourth proportional to 450.89, 621.82 and 303.72 is: 418.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    450.89 : 621.82 = 303.72 : x
  2. Step 2: Convert to fraction form
    450.89/621.82 = 303.72/x
  3. Step 3: Cross multiply
    450.89x = 621.82 × 303.72
  4. Step 4: Simplify right side
    450.89x = 188,859.17
  5. Step 5: Solve for x
    x = 188,859.17/450.89
  6. Step 6: Final answer
    x = 418.86

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.