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Finding the Fourth Proportional to 627.56, 940.06 and 285.80

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Solution

The fourth proportional to 627.56, 940.06 and 285.80 is: 428.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    627.56 : 940.06 = 285.80 : x
  2. Step 2: Convert to fraction form
    627.56/940.06 = 285.80/x
  3. Step 3: Cross multiply
    627.56x = 940.06 × 285.80
  4. Step 4: Simplify right side
    627.56x = 268,669.15
  5. Step 5: Solve for x
    x = 268,669.15/627.56
  6. Step 6: Final answer
    x = 428.12

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.