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Finding the Fourth Proportional to 627,351.90, 941,027.85 and 428,286.30

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Solution

The fourth proportional to 627,351.90, 941,027.85 and 428,286.30 is: 642,429.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    627,351.90 : 941,027.85 = 428,286.30 : x
  2. Step 2: Convert to fraction form
    627,351.90/941,027.85 = 428,286.30/x
  3. Step 3: Cross multiply
    627,351.90x = 941,027.85 × 428,286.30
  4. Step 4: Simplify right side
    627,351.90x = 403,029,336,073.46
  5. Step 5: Solve for x
    x = 403,029,336,073.46/627,351.90
  6. Step 6: Final answer
    x = 642,429.45

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Double scale
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Similar ratio
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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.