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Finding the Fourth Proportional to 627.03, 939.33 and 421.02

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Solution

The fourth proportional to 627.03, 939.33 and 421.02 is: 630.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    627.03 : 939.33 = 421.02 : x
  2. Step 2: Convert to fraction form
    627.03/939.33 = 421.02/x
  3. Step 3: Cross multiply
    627.03x = 939.33 × 421.02
  4. Step 4: Simplify right side
    627.03x = 395,476.72
  5. Step 5: Solve for x
    x = 395,476.72/627.03
  6. Step 6: Final answer
    x = 630.71

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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.