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Finding the Fourth Proportional to 450.84, 621.78 and 276.12

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Solution

The fourth proportional to 450.84, 621.78 and 276.12 is: 380.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    450.84 : 621.78 = 276.12 : x
  2. Step 2: Convert to fraction form
    450.84/621.78 = 276.12/x
  3. Step 3: Cross multiply
    450.84x = 621.78 × 276.12
  4. Step 4: Simplify right side
    450.84x = 171,685.89
  5. Step 5: Solve for x
    x = 171,685.89/450.84
  6. Step 6: Final answer
    x = 380.81

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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.