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Finding the Fourth Proportional to 450.68, 621.95 and 254.18

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Solution

The fourth proportional to 450.68, 621.95 and 254.18 is: 350.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    450.68 : 621.95 = 254.18 : x
  2. Step 2: Convert to fraction form
    450.68/621.95 = 254.18/x
  3. Step 3: Cross multiply
    450.68x = 621.95 × 254.18
  4. Step 4: Simplify right side
    450.68x = 158,087.53
  5. Step 5: Solve for x
    x = 158,087.53/450.68
  6. Step 6: Final answer
    x = 350.78

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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.