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Finding the Fourth Proportional to 627.05, 939.90 and 383.74

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Solution

The fourth proportional to 627.05, 939.90 and 383.74 is: 575.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    627.05 : 939.90 = 383.74 : x
  2. Step 2: Convert to fraction form
    627.05/939.90 = 383.74/x
  3. Step 3: Cross multiply
    627.05x = 939.90 × 383.74
  4. Step 4: Simplify right side
    627.05x = 360,677.23
  5. Step 5: Solve for x
    x = 360,677.23/627.05
  6. Step 6: Final answer
    x = 575.20

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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.