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Finding the Third Proportional to 934.50 and 1,990.50

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Solution

The third proportional to 934.50 and 1,990.50 is: 4,239.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    934.50 : 1,990.50 = 1,990.50 : x
  2. Step 2: Convert to fraction form
    934.50/1,990.50 = 1,990.50/x
  3. Step 3: Cross multiply
    934.50x = 1,990.50 × 1,990.50
  4. Step 4: Simplify right side
    934.50x = 3,962,090.25
  5. Step 5: Solve for x
    x = 3,962,090.25/934.50
  6. Step 6: Final answer
    x = 4,239.80

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Why These Related Problems?

These problems maintain the same ratio (2.13) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.