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Finding the Third Proportional to 399.30 and 846.07

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Solution

The third proportional to 399.30 and 846.07 is: 1,792.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    399.30 : 846.07 = 846.07 : x
  2. Step 2: Convert to fraction form
    399.30/846.07 = 846.07/x
  3. Step 3: Cross multiply
    399.30x = 846.07 × 846.07
  4. Step 4: Simplify right side
    399.30x = 715,834.97
  5. Step 5: Solve for x
    x = 715,834.97/399.30
  6. Step 6: Final answer
    x = 1,792.70

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Why These Related Problems?

These problems maintain the same ratio (2.12) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.