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Finding the Third Proportional to 423.94 and 785.06

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Solution

The third proportional to 423.94 and 785.06 is: 1,453.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    423.94 : 785.06 = 785.06 : x
  2. Step 2: Convert to fraction form
    423.94/785.06 = 785.06/x
  3. Step 3: Cross multiply
    423.94x = 785.06 × 785.06
  4. Step 4: Simplify right side
    423.94x = 616,323.13
  5. Step 5: Solve for x
    x = 616,323.13/423.94
  6. Step 6: Final answer
    x = 1,453.81

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Why These Related Problems?

These problems maintain the same ratio (1.85) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.