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Finding the Fourth Proportional to 627,979.70, 941,969.55 and 379,147.70

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Solution

The fourth proportional to 627,979.70, 941,969.55 and 379,147.70 is: 568,721.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    627,979.70 : 941,969.55 = 379,147.70 : x
  2. Step 2: Convert to fraction form
    627,979.70/941,969.55 = 379,147.70/x
  3. Step 3: Cross multiply
    627,979.70x = 941,969.55 × 379,147.70
  4. Step 4: Simplify right side
    627,979.70x = 357,145,588,352.54
  5. Step 5: Solve for x
    x = 357,145,588,352.54/627,979.70
  6. Step 6: Final answer
    x = 568,721.55

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Half scale
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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.