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Finding the Third Proportional to 216,855 and 338,397.75

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Solution

The third proportional to 216,855 and 338,397.75 is: 528,062.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,855 : 338,397.75 = 338,397.75 : x
  2. Step 2: Convert to fraction form
    216,855/338,397.75 = 338,397.75/x
  3. Step 3: Cross multiply
    216,855x = 338,397.75 × 338,397.75
  4. Step 4: Simplify right side
    216,855x = 114,513,037,205.06
  5. Step 5: Solve for x
    x = 114,513,037,205.06/216,855
  6. Step 6: Final answer
    x = 528,062.70

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Why These Related Problems?

These problems maintain the same ratio (1.56) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.