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Finding the Fourth Proportional to 450.44, 621.88 and 310.51

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Solution

The fourth proportional to 450.44, 621.88 and 310.51 is: 428.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    450.44 : 621.88 = 310.51 : x
  2. Step 2: Convert to fraction form
    450.44/621.88 = 310.51/x
  3. Step 3: Cross multiply
    450.44x = 621.88 × 310.51
  4. Step 4: Simplify right side
    450.44x = 193,096.85
  5. Step 5: Solve for x
    x = 193,096.85/450.44
  6. Step 6: Final answer
    x = 428.69

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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.