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Finding the Fourth Proportional to 519,730.25, 717,227.75 and 281,266.25

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Solution

The fourth proportional to 519,730.25, 717,227.75 and 281,266.25 is: 388,147.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,730.25 : 717,227.75 = 281,266.25 : x
  2. Step 2: Convert to fraction form
    519,730.25/717,227.75 = 281,266.25/x
  3. Step 3: Cross multiply
    519,730.25x = 717,227.75 × 281,266.25
  4. Step 4: Simplify right side
    519,730.25x = 201,731,958,232.11
  5. Step 5: Solve for x
    x = 201,731,958,232.11/519,730.25
  6. Step 6: Final answer
    x = 388,147.43

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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 (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.