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Finding the Third Proportional to 486.56 and 785.06

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Solution

The third proportional to 486.56 and 785.06 is: 1,266.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    486.56 : 785.06 = 785.06 : x
  2. Step 2: Convert to fraction form
    486.56/785.06 = 785.06/x
  3. Step 3: Cross multiply
    486.56x = 785.06 × 785.06
  4. Step 4: Simplify right side
    486.56x = 616,323.13
  5. Step 5: Solve for x
    x = 616,323.13/486.56
  6. Step 6: Final answer
    x = 1,266.69

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Why These Related Problems?

These problems maintain the same ratio (1.61) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.