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Finding the Fourth Proportional to 627,791.40, 941,687.10 and 438,834.60

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Solution

The fourth proportional to 627,791.40, 941,687.10 and 438,834.60 is: 658,251.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    627,791.40 : 941,687.10 = 438,834.60 : x
  2. Step 2: Convert to fraction form
    627,791.40/941,687.10 = 438,834.60/x
  3. Step 3: Cross multiply
    627,791.40x = 941,687.10 × 438,834.60
  4. Step 4: Simplify right side
    627,791.40x = 413,244,881,853.66
  5. Step 5: Solve for x
    x = 413,244,881,853.66/627,791.40
  6. Step 6: Final answer
    x = 658,251.90

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Double scale
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Similar ratio
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1.5x scale

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.