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Finding the Fourth Proportional to 642.33, 956.81 and 627.75

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Solution

The fourth proportional to 642.33, 956.81 and 627.75 is: 935.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    642.33 : 956.81 = 627.75 : x
  2. Step 2: Convert to fraction form
    642.33/956.81 = 627.75/x
  3. Step 3: Cross multiply
    642.33x = 956.81 × 627.75
  4. Step 4: Simplify right side
    642.33x = 600,639.05
  5. Step 5: Solve for x
    x = 600,639.05/642.33
  6. Step 6: Final answer
    x = 935.09

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.