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Finding the Fourth Proportional to 627.55, 939.50 and 383.33

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Solution

The fourth proportional to 627.55, 939.50 and 383.33 is: 573.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    627.55 : 939.50 = 383.33 : x
  2. Step 2: Convert to fraction form
    627.55/939.50 = 383.33/x
  3. Step 3: Cross multiply
    627.55x = 939.50 × 383.33
  4. Step 4: Simplify right side
    627.55x = 360,140.40
  5. Step 5: Solve for x
    x = 360,140.40/627.55
  6. Step 6: Final answer
    x = 573.89

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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.