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Finding the Fourth Proportional to 627.08, 940.39 and 256.79

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Solution

The fourth proportional to 627.08, 940.39 and 256.79 is: 385.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    627.08 : 940.39 = 256.79 : x
  2. Step 2: Convert to fraction form
    627.08/940.39 = 256.79/x
  3. Step 3: Cross multiply
    627.08x = 940.39 × 256.79
  4. Step 4: Simplify right side
    627.08x = 241,482.75
  5. Step 5: Solve for x
    x = 241,482.75/627.08
  6. Step 6: Final answer
    x = 385.09

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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.