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Finding the Third Proportional to 205,686 and 310,720.50

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Solution

The third proportional to 205,686 and 310,720.50 is: 469,391.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    205,686 : 310,720.50 = 310,720.50 : x
  2. Step 2: Convert to fraction form
    205,686/310,720.50 = 310,720.50/x
  3. Step 3: Cross multiply
    205,686x = 310,720.50 × 310,720.50
  4. Step 4: Simplify right side
    205,686x = 96,547,229,120.25
  5. Step 5: Solve for x
    x = 96,547,229,120.25/205,686
  6. Step 6: Final answer
    x = 469,391.35

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.