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Finding the Fourth Proportional to 450.66, 621.90 and 254.18

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Solution

The fourth proportional to 450.66, 621.90 and 254.18 is: 350.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    450.66 : 621.90 = 254.18 : x
  2. Step 2: Convert to fraction form
    450.66/621.90 = 254.18/x
  3. Step 3: Cross multiply
    450.66x = 621.90 × 254.18
  4. Step 4: Simplify right side
    450.66x = 158,074.54
  5. Step 5: Solve for x
    x = 158,074.54/450.66
  6. Step 6: Final answer
    x = 350.76

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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.